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8 AAC 63.010. Minimum plumbing standards 

(a) The codes set out in this section are adopted in accordance with AS 18.60.705 as the minimum plumbing 
standards to be followed throughout the state. The Department of Labor and Workforce Development adopts the 
following codes by reference that are published by the International Association of Plumbing and Mechanical 
Officials (lAPMO) and were adopted by lAPMO at its 71st annual conference, September 2002: 



(1) Uniform Plumbing Code, 2003 Edition, paragraphs 101.3 - 101.5.6, 103.5.1.1 - 103.5.1.4, 103.5.3 - 
103.5.3.5, 103.5.5.1 - 103.5.5.2, 103.5.6.1 - 103.5.6.3, and 103.8.1 - 103.8.2 of chapter 1 , chapters 2 through 15, 
and appendices A through L; 



(2) Uniform Swimming Pool, Spa and Hot Tub Code, 2000 edition, excluding chapter 1 , Administration; 

(3) Uniform Solar Energy Code, 2000 edition, excluding chapter 1 , Administration. 

(b) Repealed 12/6/2003 

History: Eff. 8/5/72, Register 43; am 7/12/81, Register 79; am 11/1/2000, Register 156; am 9/25/2002, 
Register 163; am 12/6/2003, Register 168 

Authority: AS 18.60.705 

AS 18.60.710 

Editor's note: Copies of the codes adopted by reference in 8 AAC 63.010 are available at the International 
Association of Plumbing and Mechanical Officials, 20001 Walnut Drive South, Walnut, California 91789-2825. 
In addition, the codes are available for inspection at the Lt. Governor's Office, Juneau, Alaska. 

As of Register 151 (October 1999), the regulations attorney made technical revisions under AS 44.62.125 (b)(6) 
to reflect the name change of the Department of Labor to the Department of Labor and Workforce Development 
made by ch. 58, SLA 1999 and the corresponding title change of the commissioner of labor. 

8 AAC 63.020. Permits 

Permits will be issued on a fee basis in accordance with the schedule outlined in AS 18.60.720 . 

History: Eff. 8/5/72, Register 43 

Authority: AS 18.60.710 

AS 18.60.720 

8 AAC 63.025. Appeals 

(a) A notice issued under AS 18.60.725 for a violation of AS 18.60.705 - 18.60.790 or of this chapter is final 
unless the person affected or the owner or contractor of a construction premise affected files an appeal with the 



commissioner within 30 days after receipt of the notice. The appeal must be in writing and must include 



(1) a specification of objections to the department's findings, and a concise summary of facts in support of each 
objection; and 



(2) a description of the relief sought. 



(b) The commissioner's decision will be based upon the departmental record including the written appeal and 
will state the facts relied upon by the commissioner in deciding the appeal. 



(c) The commissioner, in his discretion, will hold a hearing on the appeal to supplement the record where 
clarification or additional facts are necessary for a proper resolution of the appeal. 



(d) A hearing held under this section will be conducted in accordance with the Administrative Procedure Act 
(AS 44.62) except that the director will act as hearing officer. In addition to other powers conferred, the hearing 
officer may 



(1) issue a subpoena or subpoena duces tecum to compel production of testimony or other evidence at the 
hearing; 



(2) permit the testimony of a material witness to be taken by deposition; 

(3) order the continuance of a hearing; or 

(4) act upon the evidence before the hearing officer without further notice if the appellant does not appear at the 
hearing. 

(e) Within 30 days after the hearing, a copy of the decision will be sent to the appellant. Within 30 days after the 
decision is issued, the appellant may appeal to the superior court. 

History: Eff. 10/2/83, Register 87 

Authority: AS 18.60.710 

AS 18.60.725 

8 A AC 63.030. Use of plastic drain, waste and vent (dwv) pipe and fittings 

Repealed 7/12/81. 



Chapter 64 



Logging And Sawmill Safety Code 

Repealed 1/26/78 



Chapter 66 
General Safety Code 



Repealed 1/30/75 



Chapter 70 
Electrical Safety Code 



Section 

10. Scope and effect. 

20. (Repealed). 

25. Minimum electrical standards. 

30. (Repealed). 

40. Authorization. 



50. (Repealed). 

60. Inspections. 

70. Inspection fees. 

75. Appeals. 

80. Computation of time. 

85. Sale or transfer of consumer electrical products. 

86. Exemptions to third-party certification. 
90. Definitions. 

8 AAC 70.010. Scope and effect 

8 AAC 70.010 - 8 AAC 70.090 apply to all installations of new electrical wiring and alterations to existing 
electrical wiring in all "public structures," as defined in 8 AAC 70.090, and any place of employment. 

History: Eff. 10/9/70, Register 36 




Notice 



The 2003 edition of the Uniform Plumbing Code is developed through a consensus standards 
development process approved by the American National Standards Institute. This process brings together 
volunteers representing varied viewpoints and interests to achieve consensus on plumbing issues. While the 
International Association of Plumbing and Mechanical Officials (lAPMO) administers the process and 
establishes rules to promote fairness in the development of consensus, it does not independently test, evaluate, 
or verify the accuracy of any information or the soundness of any judgments contained in its codes and 
standards. 

lAPMO disclaims liability for any personal injury, property, or other damages of any nature 
whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the 
publication, use of, or reliance on this document. lAPMO also makes no guaranty or warranty as to the 
accuracy or completeness of any information published herein. 

In issuing and making this document available, lAPMO is not undertaking to render professional or 
other services for or on behalf of any person or entity. Nor is lAPMO undertaking to perform any duty owed 
by any person or entity to someone else. Anyone using this document should rely on his or her own 
independent judgment or, as appropriate, seek the advice of a competent professional in determining the 
exercise of reasonable care in any given circumstances. 



AN AMERICAN NATIONAL STANDARD 

lAPMO/ANSi UPC 1-2003 



UNIFORM 
PLUMBING 

COD 





~ _^^ ^^^ J^ 



^ 







WMAII 






REVISION MARKINGS 

Code changes from the 2000 edition are marked in the margins as follows: 

An arrow denotes a deletion. 

A vertical denotes a change. 

A reference in brackets [ ] following a section or paragraph indicates material that has 
been extracted from another document. This reprinted material is not the complete 
and official position of the National Fire Protection Association on the reference 
subject which is represented by the standard in its entirety. 

Information on referenced publications can be found in Chapter 17. 

All pressures used in this code are gauge pressures iinless otherwise indicated. 



Copyright © 2003 

by 

International Association of Plumbing and Mechanical Officials 

All Rights Reserved 

No part of this work may be reproduced or recorded in any form or by any means, 
except as may be expressly permitted in writing by the publisher. 

Twenty -Third Edition 

First Printing, January 2003 

Second Printing, October 2003 

Second Printing, December 2003 

Third Printing, March 2004 

Fourth Printing, August 2004 

Fifth Printing, February 2005 

Sixth Printing, August 2005 

Seventh Printing, November 2005 

Eighth Printing, February 2006 

Ninth Printing, November 2006 



ISSN 0733-2335 

Published by the International Association of Plumbing and Mechanical Officials 

5001 E. Philadelphia Street • Ontario, CA 91761-2816 - USA 

Main Phone: (909) 472-4100 • Main Fax: (909) 472-4150 



2003 UPC Foreword 

The advantages of a uniform plumbing code adopted by various local jurisdictions have long been recognized. 
Disorder in the industry as a result of widely divergent plumbing practices and the use of many different, 
often conflicting, plumbing codes by local jurisdictions influenced the Western Plumbing Officials Association 
(now the International Association of Plumbing and Mechanical Officials [lAPMO]) to form a committee of 
plumbing inspectors, master and journeyman plumbers, sanitary and mechanical engineers, assisted by public 
utility companies, and the plumbing industry to create a basic plumbing document for general use. The 
product of this effort, the first edition of the Uniform Plumbing Code^'^ (UPC^'^) was officially adopted by 
lAPMO in 1945. The widespread use of this code over the past five decades by jurisdictions throughout the 
United States and internationally is testimony to its merit. 

With the publication of the 2003 Edition of the Uniform Plumbing Code, another significant milestone has 
been reached. For the first time in the history of the United States, a plumbing code developed through a true 
consensus process has been achieved. Contributions to the content of this code were made by every segment of 
the built industry including such diverse interests as consumers, enforcing authorities, installers /maintainers, 
insurance, labor, manufacturers, research /standards /testing laboratories, special experts, and users. 

The consensus process, accredited by the American National Standards Institute, serves as the framev^ork for 
the Comprehensive Consensus'^'^ Code (C3) set - our nation's first true set of ANSI accredited harmonized 
construction codes for the built industry. lAPMO's C3 partners include the National Fire Protection 
Association (NFPA), the Western Fire Chiefs Association (WFCA) and the American Society of Fleating, 
Refrigerating and Air Conditioning Engineers (ASHRAE). 

The UPC is designed to provide consumers with safe and sanitary plumbing systems while, at the same time, 
allowing latitude for innovation and new technologies. The public at large is encouraged and invited to 
participate in lAPMO's open consensus code development process. This code is updated every three years. A 
code development timeline and other relevant information is available at lAPMO's website at 
www.iapmo.org. 

The Uniform Plumbing Code is dedicated to all those who, in working to achieve "the ultimate plumbing 
code," have unselfishly devoted their time, effort and personal funds to create and maintain this, the finest 
plumbing code in existence today. 

The 2003 Uniform Plumbing Code is supported by the C3 partners as well as the American Society of Sanitary 
Engineering (ASSE), Mechanical Contractors Association of America (MCAA), Plumbing-Heating-Cooling 
Contractors National Association (PHCC-NA), the United Association (UA), and the World Plumbing Council 
(WPC). The presence of these logos, while reflecting support, does not imply any ownership of the copyright 
to the UPC which is held exclusively by lAPMO. Further, the logos of these associations indicates the support 
of lAPMO's open, consensus process being used to develop lAPMO's codes and standards. 

The addresses of the organizations are as follows: 

ASHRAE - 1791 TuUie Circle, N.E. • Atlanta, GA 30329 • (800) 527-4723 
ASSE - 901 Canterbury Road, Suite A • Westlake, OH 44145-7201 • (440) 835-3040 
MCAA - 1385 Piccard Drive • Rockville, MD 20850 • (301) 869-5800 
NFPA - 1 Batterymarch Park • Quincy, MA 02269 • (617) 770-3000 
PHCC-NA - PO Box 6808 • Falls Church, VA 22046 • (800) 533-7694 
UA - 901 Massachusetts Avenue NW • Washington, DC 20001 • (202) 628-5823 
WFCA - 727 Center Street NE, Suite 300 • Salem, OR 97301 • (503) 588-7665 
WPC - WPC Secretary • c/o The Institute of Plumbing • 64 Station Lane • Hornchurch Essex 
RM12 6NB • United Kingdom • +44 17-08-47-27-91 



Tentative Interim Amendment (TIA) 

A Tentative Interim Amendment (TIA) to any Document may be processed if the Council Secretary 
determines, after a preliminary review, and consultation with the appropriate Chair, that the Amendment 
appears to be of an emergency nature requiring prompt action and has the endorsement of a Member of the 
involved Technical Committee. 



Section 206.0 Design Flood Elevation - The elevation of the "design flood," including wave height, relative 
to the datum specified on the community's legally designated flood hazard map. 

Section 206.0 Dialysis Water System - a collection of water purification devices that will purify and 
distribute water or the express use of providing a hemodialysis treatment to a patient with End State Renal 
Disease (ESRD). This collection of water purification devices collectively is considered a medical device and 
registered with the Food and Drug Administration as a medical device. The water purification devices 
included in this system could include but are not limited to booster pumps, reverse osmosis (RO) unit, depth 
filters, carbon filtration tanks, water softener, UV lights, ultrafilters, storage tanks, distribution piping, ozone 
generators, deionization system, dialyzer reprocessing machines, concentrate mixing systems and artificial 
kidney machines. This tentative Interim Amendment (TIA) was issued on December 7, 2005. 

Section 208.0 Flood Hazard Area - The greater of the following two areas: 

1. The area within a floodplain subject to a 1 percent or greater chance of flooding in any given year. 

2. The area designated as a flood hazard area on a community's flood hazard map, or otherwise 
legally designated. This tentative Interim Amendment (TIA) was issued on September 26, 2005. 

Flood Hazard Area Subject to High Velocity Wave Action - Area within the flood hazard area which is 
subject to high velocity wave action, and shown on a Flood Insurance Rate Map or other flood hazard map as 
Zone V, VO, VE, or VI -30. This tentative Interim Amendment (TIA) was issued on September 26, 2005. 

Section 301 .3 Flood Hazard Resistance. 

Section 301.3.1 General. Plumbing systems shall be located above the design flood elevation. 

Exception: Plumbing systems are permitted to be located below the design flood elevation provided 

that the systems are designed and installed to prevent water from entering or accumulating within 

their components and the systems are constructed to resist hydrostatic and hydrodynamic loads and 

stresses, including the effects of buoyancy, during the occurrence of flooding to the design flood 

elevation. This tentative Interim Amendment (TIA) was issued on September 26, 2005. 

Section 301.3.2 Flood Hazard Areas Subject to High Velocity Wave Action. Plumbing systems in 

buildings located in flood hazard areas subject to high velocity wave action shall meet the requirements of 

Section 301.3.1 and the plumbing systems, pipes and fixtures shall not be mounted on or penetrate through 

walls that are intended to breakaway under flood loads as required by the building code. This tentative 

Interim Amendment (TIA) was issued on September 26, 2005. 

Section 412.7 - All shower compartments, regardless of shape, shall have a minimum finished interior of one 
thousand twenty-four (1024) square inches (0.66 m^) and shall also be capable of encompassing a thirty (30) 
inch (750 mm) circle. The minimum required area and dimensions shall be measured at a height equal to the 
top of the threshold at a point tangent to its centerline. The minimum area and dimensions shall be maintained 
to a pint seventy (70) inches (1778 mm) above the shower drain outlet with no protrusions other than fixture 
valve or valves, shower head, soap dishes, shelves, and safety grab bars or rails. Fold-down seats in accessible 
shower stalls shall be permitted to protrude into the thirty (30) inch (750 mm) circle. 

Exception No. 1: Showers which are designed to comply with ICC A117.1. 

Exception No. 2: The minimum required area and dimension shall not apply where an existing 

bathtub is replaced by a shower receptor having minimum overall dimensions of 30 inches (750 mm) 

in width and 60 inches (1,500 mm) in length. 
This tentative Interim Amendment (TIA) was issued on June 15, 2005. 



VI 



Section 507.9 Louvers Grilles and Screens. 

(a) Louvers and Grilles. The required sizes of openings for combustion, ventilation and dilution air 
shall be base don the net free area of each opening. Where the free area through a design of louver or 
grille is known, it shall be used in calculating the size opening required to provide the free area 
specified. Where the design and free area are not known, it shall be assumed that wood louvers will 
have 25 percent free area and metal louvers and grilles will have 75 percent free area. Non-motorized 
louvers and grilles shall be fixed in the open position. 

(b) Minimum Screen Mesh Size. Screens shall not be smaller than 1/4 inch mesh. 
Renumber existing Section 507.9(B) as 507.9 (C). 

This tentative Interim Amendment (TIA) was issued on September 17, 2003 

Section 603.4.23 Pure Water Process Systems - The water supply to a pure water process system, such as 
dialysis systems, chip washing facilities and similar process piping systems, shall be protected from back 
pressure and back siphonage by a reduced pressure principle backflow preventer. This tentative Interim 
Amendment (TIA) was issued on December 7, 2005. 

Section 603.4.23.1 Dialysis Water System - The individual connections of the dialysis related equipment to 
the dialysis pure water system do not require additional backflow protection. This tentative Interim 
Amendment (TIA) was issued on December 7, 2005. 

Section 604.14 Dialysis Water Systems - Dialysis water purification and distribution systems shall be 
constructed from materials that do not interact chemically or physically so as to adversely affect the purity of 
water used for dialysis applications. The materials used shall also be compatible with the type of disinfectant 
used to disinfect the purified water distribution system. Non-reactive materials shall comply with Section 
510(k), CFR 21 shall be used. This tentative Interim Amendment (TIA) was issued on December 7, 2005. 

Section 606.1.4 Dialysis Water Systems - Joints and connections used in dialysis water purification and 
distribution systems shall be compatible with the material of construction and shall be constructed to 
minimize dead flow areas. Mechanical, threaded and solvent cemented joints are acceptable. This tentative 
Interim Amendment (TIA) was issued on December 7, 2005. 

Section 715.3 Regarding replacement of existing building sewer and building storm sewers using trenchless 
methodology and materials shall be installed in accordance with lAPMO IS-26. This tentative Interim 
Amendment (TIA) was issued on September 17, 2003. 

Appendix K, Section K1 Private Sewage Disposal - General 

(A) The Authority Having Jurisdiction may grant exceptions to the provisions of this appendix 

for permitted structures which have been destroyed due to fire or natural disaster and which 
cannot be reconstructed in compliance with these provisions provided that such exceptions 
are the minimum necessary. 

(D) Disposal systems shall be located outside of flood hazard areas. 

Exception: Where suitable sites outside of flood hazard areas are not available, disposal 
systems may be located in flood hazard areas on sites where the effects of inundation under 
conditions of the design flood are minimized. 
This tentative Interim Amendment (TIA) was issued on September 26, 2005. 

Appendix K, Section K5 Septic Tank Construction 

(K) Structure Design 

(1) General. Each such tank shall be structurally designed to withstand all.... 

(2) Flood Loads. In flood hazard areas, tanks shall be anchored to counter buoyant forces 
during conditions of the design flood. The vent termination and service manhole of the 
tank shall be a minimum of 2 feet (610 mm) above the design flood elevation or fitted with 
covers designed to prevent the inflow of floodwater or outflow of the contents of the tanks 
during conditions of the design flood. 

This tentative Interim Amendment (TIA) was issued on September 26, 2005. 



VII 



Table K-1 Location of Sewage Disposal Systems 



Minimum Horizontal Distance 
in Clear Required From: 


Building Sewer 


Septic Tank 


Disposal Field 


Seepage Pit or 
Cesspool 


Streams and other bodies of 
water 


50 feet (15240 mm) 


50 feet (15240 mm) 


100 feet (30.5 m) 


150 feet (45.7 m) 



Note: 



7. These minimum clear horizontal distances shall also apply between disposal fields, seepage pits, and the mean high-tide line. 
This tentative Interim Amendment (TIA) was issued on September 26, 2005. 



VIII 



COMMITTEE ON UNIFORM PLUMBING CODE 

These lists represent the membership at the time the Committee was balloted on the final text of this edition. Since that time, changes in the 
membership may have occurred. 



Terry Swisher, Chairman 
State of Oregon, [E] 

James Weflen, Secretary 
Copper Development Association, [M] 



Julius Ballanco, JB Engineering /Code Consultant PC [SE] 

Rep. American Society of Plumbing Engineers 
Paul Cabot, American Gas Association [U] 
Sidney Cavanaugh, United Association [L] 
Richard Church, Plastic Pipe and Fittings Association [M] 
Donald Dickerson, Donald Dickerson Associates [SE] 
Kenneth Ford, National Association of Home Builders [U] 
Lawrence Gibson, Intertek Testing Services [R/T] 
Gary Hile, Municipality of Anchorage [E] 
Theodore Lernoff, NFPA [R/T] 
William LeVan, Cast Iron Soil Pipe Institute [M] 
Perry Meikle, PW Meikle Consultants [R/T] 

Rep. NSF International 
David Naughton, Underwriter Laboratories [R/T] 



Gerald Phariss, UA Southeast Training Center [R/T] 
Rep. American Society of Sanitary Engineering 
Robert Rawlings, State of Idaho [E] 
Phillips Ribbs, City of San Jose [E] 
Arnold Rodio, Pace Setter Plumbing [I/M] 
John Roth, City of Houston [E] 
Edward Sanchez, City of Los Angeles [E] 
Anthony Scarano, Plastics Piping Consultant [SE] 
Joseph Stemola, National Propane Gas Association (NPGA) [U] 
Don Traylor, State Plumbing Board of Louisiana [E] 
David Viola, Plumbing Manufacturers Institute [M] 
William Whitehead, Plumbing and Drainage Institiite [M] 
Richard Zannini, Plumbing-Heating-Cooling Contractors 
National Association [I/M] 



Alternates 



Rand Ackroyd, Rand Engineering [M] 

Rep. Plumbing and Drainage Institute 
Ian Chang, Intertek Testing Services [R/T] 
Shannon Corcoran, American Society of Sanitary Engineering 

[R/T] 
Bob Friedlander, Construction Code Consultant [M] 

Rep. Plastic Pipe and Fittings Association 
Andrew Kireta, Copper Development Association [M] 



Robert Kordulak, Plumbing-Heating-Cooling Contractors 

National Association [I/M] 
Duffy Latham, City of Los Angeles [E] 
John Taecker, Underwriter Laboratories [R/T] 
April Traf ton, Donald Dickerson Associates [SE] 
Fred Volkers, United Association [L] 
James Walls, Cast Iron Soil Pipe Institute [M] 



Courtney Aford, Ex-Officio, lAPMO [E]* 
John Halliwill, lAPMO Staff Liaison 



Nonvoting 

Morrie Klimboff, Member Emeritus, M Klimboff Consulting [C]* 



Committee Membership Classification Abbreviations 

These classifications apply to Technical Committee members and represent their principal interest in the activity of a cofnmittee. 

M Manufacturer: A representative of a maker or marketer of a product, assembly, or system, or portion thereof, that is 

affected by the standard. 
U User: A representative of an entity that is subject to the provisions of the standard or that voluntarily uses the standard. 

I/M Installer iMaintainer: A representative of an entity that is in the business of installing or maintaining a 

product, assembly, or system affected by the standard. 
L Labor: A labor representative or employee concerned with safety in the workplace. 

R/T Applied Research/Testing Laboratory: A representative of an independent testing laboratory or independent applied 

research organization that promulgates and /or enforces standards. 
E Enforcing Authority: A reperesentative or an agency or an organization that promulgates and /or enforces standards. 

I Insurance: A representative of an insurance company, broker, agent, bureau, or inspection agency. 

C Consumer: A person who is, or represents, the ultimate purchaser of a product, system, or service affected by the 

standard, but who is not included in the User classification. 
SE Special Expert: A person not represeting any of the previous classifications, but who has special expertise in the scope of 

the standard or portion thereof. 



IX 



FORM FOR PROPOSALS ON lAPMO UPC/UMC COMMITTEE DOCUMENT 



NOTE: All proposals MUST be received by 5:00 PM PST/PDST on the published proposal-closing date. 



For further information on the standards-making process, please 

contact Codes and Standards Administration at 909-472-4110 

For technical assistance, please call lAPMO at 909-472-41 1 1 or 

909-472-4112 



FOR OFFICE USE ONLY 



LOG# 



DATE REC'D: 



n Paper 



□ Download* □ CD-ROM 



PLEASE USE SEPARATE FORM FOR EACH PROPOSAL 

Please indicate in which format you wish to receive your ROP/ROC: 

*Note: In choosing the download option, you intend to view the ROP/ROC from our website, NO copy will be sent to you. 



Date: 



Name: 



Telephone #: 



Company: 



Street Address:. 



City: 



State:. 



Zip: 



Please Indicate Organization Represented (if any): , 
1 . a) lAPMO Document Title 



Document Year. 



b) Section/Paragraph 

2. Proposal Recommends (check one): 

3. Proposal (Include proposed new or revised wording, or identification of wording to be deleted): [Note: Proposed 
text should be In legislative format: I.e., use underscore to denote wording to be inserted ( inserted wording ) and strike- 
through to denote wording to be deleted ( dolotod word i ng ). PLEASE TYPE OR PRINT LEGIBLY IN BLACK INK.] 



Statement of Problem and Substantiation for Proposal: [Note: State the problem that will be resolved by your 
recommendations; give the specific reason for your proposal, including copies of tests, research papers, etc. If more than 
200 words, it may be abstracted for publication.] 



This proposal is original material. [Note: Original material is considered to be the submitter's own idea based on or as a result 

of his/her own experience, thought, or research and, to the best of his/her knowledge, is not copied from another source.] 

This proposal is not original material, its source (if known) is as follows: 



I hereby grant lAPMO all and full rights in copyright, in this proposal, and I understand that I acquire no rights in any publication of 
lAPMO in which this proposal appears in this or another similar or analogous form. 



Signature (Required): 



lAPMO CODES DEPARTMENT FAX • (909)472-4157 or (909)472-4246 
Mail to: Secretary, Standards Council • lAPMO • 5001 E Philadelphia Street • Ontario • CA • 91761-2816 



INSTRUCTIONS FOR SUBMITTING PROPOSALS 

- PLEASE READ CAREFULLY- 

1 . Type or print in BLACK ink. 

2. Indicate tiie title of the document and the document year. Also indicate the specific 
section or paragraph that the proposed amendment applies to. 

3. Check the appropriate box to indicate whether this proposal recommends adding new 
text, revising existing text, or deleting text. 

4. In the space identified as "Proposal", indicate the exact wording you propose as new 
or revised text, or the text you propose be deleted. 

5. In the space title "Statement of Problem and Substantiation for Proposal", state the 
problem which will be resolved by your recommendation and give the specific reason 
for your proposal. Include copies of test results, research papers, fire experience, or 
other materials that substantiate your recommendation. [See note below, item (f).] 

6. Check the appropriate box to indicate whether or not this proposal is original material, 
and if it is not, indicate the source of the material. 

7. Sign the proposal. 

If supplementary material (photographs, diagrams, reports, etc.) is included, you may be 
required to submit sufficient copies for all members and alternates of the technical committee. 
The technical committee is authorized to abstract the "Statement of Problem and 
Substantiation for Proposal" if it exceeds 200 words for publication in the Report on Proposals. 

NOTE: The lAPMO Regulations Governing Committee Projects in Paragraph 4-3.3 state: 
Each proposal shall be submitted to the Council Secretary and shall include: (a) identification 
of the submitter and his or her affiliation (i.e., technical committee, organization, company), 
where appropriate; (b) identification of the document, edition of the document, and paragraph 
of the document to which the proposal is directed; (c) the proposed text of the proposal, 
including the wording to be added, revised (and how revised), or deleted; (d) a statement of 
the problem and substantiation for proposal; (e) the signature of the submitter; and (f) two 
copies of any document(s) (other than an lAPMO document) being proposed as a reference 
standard or publication (see 3-3.7). 



XI 



UNIFORM PLUMBING CODE 



Chapter 1 Administration 1 

101.0 Title, Scope, General 1 

101.1 Title 1 

101.2 Purpose 1 

101.3 Plans Required 1 

101.4 Scope 1 

101.5 Application to Existing 

Plumbing System 2 

102.0 Organization and Enforcement 2 

102.1 Authority Having Jurisdiction 2 

102.2 Duties and Powers of the 

Authority Having Jurisdiction 2 

102.3 Violations and Penalties 3 

103.0 Permits and Inspections 3 

103.1 Permits 3 

103.2 Application for Permit 3 

103.3 Permit Issuance 4 

103.4 Fees 5 

103.5 Inspections 6 

103.6 Connection Approval 7 

103.7 Unconstitutionality 8 

103.8 Validity 8 

Table 1-1 Plumbing Permit Fees 9 

Chapter 2 Definitions 11 

201.0 General 11 

202.0 Definition of Terms 11 

Chapter 3 General Regulations 19 

301.0 Materials - Standards and Alternates ..19 

301.1 Minimum Standards 19 

301.2 Alternate Materials and Methods 
Equivalency 19 

302.0 Iron Pipe Size (IPS) Pipe 20 

303.0 Disposal of Liquid Waste 20 

304.0 Connections of Plumbing 

System Required 20 

305.0 Sewers Required 20 

306.0 Damage of Drainage System 

or Public Sewer 20 

307.0 Industrial Wastes 20 

308.0 Location 20 

309.0 Improper Location 20 

310.0 Workmanship 21 

311.0 Prohibited Fittings and Practices . . .21 



312.0 Independent Systems 21 

313.0 Protection of Piping, Materials, 

and Structures 21 

314.0 Hangers and Supports 22 

315.0 Trenching, Excavation 

and Backfill .22 

316.0 Joints and Connections .23 

317.0 Increasers and Reducers 24 

318.0 Food Handling 

Establishments 24 

319.0 Test Gauges 24 

320.0 Medical Gas and Vacuum Systems . .25 

Chapter 4 Plumbing Fixtures and 

Fixture Fittings 27 

401.0 Materials - 

General Requirements 27 

402.0 Water-Conserving 

Fixtures and Fittings ^ . . .27 

403.0 Materials - Alternates .27 

404.0 Overflows 27 

405.0 Strainers and Connections 27 

406.0 Prohibited Fixtures 28 

407.0 Special Fixtures and Specialties ... .28 

408.0 Installation 28 

409.0 Water Closets 29 

410.0 Urinals 29 

411.0 Flushing Devices for Water 

Closets and Urinals 29 

412.0 Floor Drains and Shower Stalls 29 

413.0 Minimum Number of 

Required Fixtures 31 

414.0 Fixtures and Fixture Fittings for 

Persons with Disabilities 32 

415.0 Whirlpool Bathtubs 32 

416.0 Installation of Fixture Fittings 32 

417.0 Bidets .32 

418.0 Deleted 32 

419.0 Future Fixtures 32 

420.0 Shower and Tub /Shower 

Combination Control Valves 33 

421 .0 Limitation of Hot Water 

in Bathtubs 33 

Table 4-1 Minimum Plumbing Facilities 33 



XII 



TABLE OF CONTENTS 

Chapter 5 Water Heaters Part I 37 701.0 

501.0 General 37 702.0 

502.0 Definitions 37 703.0 

503.0 Permits 38 Table 7-3 

504.0 Inspection 38 

505.0 Water Heater Requirements 38 Table 7-4 

506.0 Oil-Burning and 

Other Water Heater 38 

507.0 Air for Combustion and Ventilation . . .38 '^^^■^ 

508.0 Other Water Heater ^^^-^ 

Installation Requirements 41 

509.0 Equipment on Roofs 44 

707.0 
510.0 Venting of Equipment 45 

511.0 Sizing of Category I Venting Systems ... 59 

512.0 Direct- Vent Equipment 63 _„„ ^^ 

Part II Sizing of Venting Systems Serving 71 n n 

Appliances Equipped with Draft 
Hoods, Category I Appliances, and 
Appliances Listed for Use with 

Type B Vents 82 711.0 

712.0 

Chapter 6 Water Supply and Distribution . . .91 

601.0 Running Water Required 91 ^^^ " 

602.0 Unlawful Connections 91 '^^^■^ 

603.0 Cross-connection Control 92 '^"^^•^ 

604.0 Materials 96 

605.0 Valves 97 '^^^'^ 

71 A n 

606.0 Joints and Connections 98 

717.0 

607.0 " Gravity Supply Tanks 98 

^ ^^ ^ 718.0 

608.0 Water Pressure, Pressure Regulators, 

Pressure Relief Valves, and Vacuum 

719.1) 

Relief Valves 98 ^20 

609.0 Installation, Testing, Unions, 721 n 

and Location 99 722 

Table 6-4 Water Supply Fixture Units (WSFU) , 

and Minimum Fixture vortn 

Branch Sizes 101 

Table 6-5 Fixture Unit Table for Determining Chapter 8 

Water Pipe and Meter Sizes 102 ^q^ q 

610.0 Size of Potable Water Piping 103 802.0 

611.0 Drinking Water Treatment Units . .105 803.0 

804.0 

Chapter 7 Sanitary Drainage 107 805.0 

Part I Drainage Systems 107 806.0 



Materials 107 

Fixture Unit Equivalents 109 

Size of Drainage Piping 109 

Drainage Fixture Unit Values 

(DFU) 108 

Discharge Capacity In Gallons per 
Minute (Liters per Second) For 

Intermittent Flow Only 109 

Fixture Connections (Drainage) . . .109 

Joints and Connections 110 

Changes in Direction of Drainage 

Flow Ill 

Cleanouts Ill 

Grade of Horizontal Drainage 

Piping 112 

Gravity Drainage Required 113 

Drainage of Fixtures Located Below 
the Next Upstream Manhole or Below 

the Main Sewer Level , . .113 

Suds Relief 114 

Testing 114 

Building Sewers 115 

Sewer Required 115 

Damage to Public Sewer of Private 

Sewage Disposal System 115 

Building Sewer Materials 115 

Markings .115 

Size of Building Sewers .116 

Grade, Support, and Protection of 

Building Sewers 116 

Cleanouts 116 

Sewer and Water Pipes 116 

Location 117 

Abandoned Sewers and Sewage 

Disposal Facilities 118 

Building Sewer Test .118 

Indirect Wastes 119 

Indirect Wastes 119 

Approvals 119 

Indirect Waste Piping .120 

Indirect Waste Receptors 120 

Pressure Drainage Connections . . .120 
Sterile Equipment 120 



XIII 



UNIFORM PLUMBING CODE 



807.0 Appliances 120 

808.0 Cooling Water 120 

809.0 Drinking Fountains 121 

810.0 Steam and Hot Water Drainage . 
Condensers and Sumps 121 

811.0 Chemical Wastes 121 

812.0 Clear Water Wastes 122 

813.0 Swimming Pools 122 

814.0 (Reserved) 122 

815.0 Condeiisate Wastes and Control . .122 

Chapter 9 Vents 123 

901.0 Vents Required 123 

902.0 Vents Not Required 123 

903.0 Materials 123 

904.0 Size of Vents ......; 123 

905.0 Vent Pipe Grades and Connections . .124 

906.0 Vent Termination 124 

907.0 Vent Stacks and Relief Vents 124 

908.0 Vertical Wet Venting 125 

909.0 Special Venting for Island Fixtures . .125 

910.0 Combination Waste and 

Vent Systems 125 

Chapter 10 Traps and Interceptors 127 

1001.0 Traps Required 127 

1002.0 Traps Protected by Vent Pipes .' . . .127 

1003.0 Traps - Described 127 

1004.0 Traps - Prohibited : .128 

1005.0 Trap Seals 128 

1006.0 Floor Drain Traps 128 

1007.0 Trap Seal Protection j . .128 

1008.0 Building Traps 

1009.0 Industrial Interceptors (Clarifiers) 

and Separators ; ; . . . .128 

1010.0 Slaughterhouses, Packing 

Establishments, etc 129 

1011.0 Minimum Requirements 

for Auto Wash racks 129 

1012.0 Commercial and 

Industrial Laundries 129 

1013:0 Bottling Establishments 129 

1014.0 Grease Traps and 

Grease Interceptors 129 

1015.0 Food Waste Disposal and 

Dishwasher Prohibited 130 



1016.0 Sand Interceptors 130 

1017.0 Oil and Flammable 

Liquids Interceptors 130 

Chapter 11 Storm Drainage 133 

1101.0 General 133 

1102.0 Materials ; 135 

1103.0 Traps on Storm Drains 

and Leaders i 135 

1104.0 Leaders, Conductors, 

and Conriections 135 

1105.0 Roof Drains 135 

1106.0 Size of Leaders, Conductors, and 

Storni Drains 141 

1107.0 Values of Continuous Flow 141 

1108.0 ControUed-Flow Roof Drainage . . .141 
1109.0 Testing 142 

Chapter 12 Fuel Piping 145 

1201.0 Scope of Gas Piping 145 

1202.0 General 145 

1203.0 Definitiorts 145 

1204.0 Inspection 146 

1205.0 Certificate of Inspection 146 

1206.0 Authority to Render 

Gas Service .147 

1207.0 Authority to Disconnect 147 

1208.0 Temporary Use of Gas 147 

1209.0 Gas-Piping System Design, 

Materials, and Components 147 

1210.0 (Reserved) 154 

1211.0 Gas Piping Installation 154 

1212.0 Equipment Connections to Building 

Piping .161 

1213.0 Liquefied Petroleum Gas Facilities 

and Piping 162 

1214.0 Pressure Testing and Inspection . . .162 
1215.0 Interconnections Between 

Gas Piping Systems 164 

1216.0 Required Gas Supply 164 

1217.0 Required Gas Piping Size ....... .165 

Table 12-7 to Table 12-23 167 

Chapter 13 Health Care Facilities and Medical Gas 
and Vacuum Systems 187 



XIV 



TABLE OF CONTENTS 



Part I Special Requirements for Health Care 

Facilities 187 

1301.0 Application 187 

1302.0 Medical Gas and Vacuum Piping 

Systems -Installation Requirements . .187 

1303.0 Protrusions from Walls 187 

1304.0 Psychiatric Patient Rooms 187 

1305.0 Locations for Ice Storage 187 

1306.0 Sterilizers 187 

1307.0 Vapor Vents and Stacks 

for Sterilizers 188 

1308.0 Aspirators 188 

Part II Medical Gas and Vacuum System . .188 

1309.0 Application 188 

1310.0 Definitions 188 

1311.0 General Requirements 189 

1312.0 Plan Review 190 

1313.0 System Performance 191 

1314.0 (Reserved) 191 

1315.0 Required Pipe Sizing 191 

1316.0 Workmanship 191 

1317.0 Materials 192 

1318.0 Clearung for Medical 

Gas Piping Systems 194 

1319.0 Installation of Piping 194 

1320.0 Joints 195 

1321.0 Valves - Requirements, Locations, 

and Labeling 197 

1322.0 Pressure Regulating Equipment . . .199 

1323.0 Station Outlets /Inlets 199 

1324.0 Labeling and Identification 199 

1325.0 Alarms 200 

1326.0 Medical Air System 200 

1327.0 Medical Vacuum Pump System . . .201 

1328.0 (Reserved) 202 

1329.0 Testing and Inspection 202 

1330.0 (Reserved) 204 

1331.0 System Certification 204 



Abbreviation in Table 14-1 236 

Chapter 15 Firestop Protection .237 

1501.0 General Requirements .237 

1502.0 Plans and Specifications 237 

1503.0 Installation .237 

1504.0 Definitions 237 

1505.0 Combustion Installations 237 

1506.0 Non-Combustible 

Piping Installation 237 

1507.0 Required Inspection 238 

Appendices Table of Contents 239 

Appendix A Recommended Rules for Sizing the 

Water Supply System 241 

Appendix B Explanatory Notes on Combination 

Waste and Vent Systems 257 

Appendix C Deleted 
Appendix D Sizing Stormwater 

Drainage Systems 259 

Appendix E Manufactured /Mobile Home Parks and 
Recreational Vehicle Parks 267 

Appendix F (Reserved) 

Appendix G Gray water Systems for 

Single-Family Dwellings ; . .279 

Appendix H Recommended Procedures for Design, 
Construction, and Installation of 

Commercial Kitchen Grease 

Interceptors 289 

Appendix I Installation Standards Table of 

Content 293 

Appendix J Reclaimed Water Systems for Non- 
Residential Buildings 397 

Appendix K Private Sewage Disposal Systems . .401 

Appendix L Alternate Plumbing Systems 413 

Useful Tables 419 

Index 427 



Chapter 14 Mandatory Referenced 

Standards 211 

Table 14-1 Standards for Materials, Equipment, 

Joints, and Connections 211 

Table 14-1 Index 230 



XV 



UNIFORM PLUMBING CODE 



XVI 



CHAPTER 1 

ADMINISTRATION 



101.0 Title, Scope, and General. 

101.1 Title. 

This document shall be known as the "Uniform 
Plumbing Code/' may be cited as such, and will be 
referred to herein as "this code." 

101.2 Purpose. 

This code is an ordinance providing minimum 
requirements and standards for the protection of the 
public health, safety, and welfare. 

101.3 Plans Required. 

I The Authority Having Jurisdiction may require the 
submission of plans, specifications, drawings, and 

I such other information as the Authority Having 
Jurisdiction may deem necessary, prior to the 
commencement of, and at any time during the 
progress of, any work regulated by this code. 

The issuance of a permit upon plans and 

(specifications shall not prevent the Authority Having 
Jurisdiction from thereafter requiring the correction 
of errors in said plans and specifications or from 
preventing construction operations being carried on 
thereunder when in violation of this code or of any 
other pertinent ordinance or from revoking any 
certificate of approval when issued in error. 

101.4 Scope. 

101.4.1 The provisions of this code shall apply 
to the erection, installation, alteration, repair, 
relocation, replacement, addition to, use, or 
maintenance of plumbing systems within this 
jurisdiction. 

1 01 .4.1 .1 Repairs and Alterations. 

101.4.1.1.1 In existing buildings or 
premises in which plumbing 
installations are to be altered, repaired, 
or renovated, deviations from the 
provisions of this code are permitted, 
provided such deviations are found to 
be necessary and are first approved by 

I the Authority Having Jurisdiction. 

101.4.1.1.2 Existing building sewers 
and building drains may be used in 
connection with new buildings or new 
plumbing and drainage work only 
when they are found on examination 
and test to conform in all respects to the 
requirements governing new work, and 

I the proper Authority Having 

Jurisdiction shall notify the owner to 



make any changes necessary to conform 
to this code. No building or part 
thereof, shall be erected or placed over 
any part of a drainage system which is 
constructed of materials other than 
those approved elsewhere in this code 
for use under or within a building. 

101.4.1.1.3 All openings into a 
drainage or vent system, excepting 
those openings to which plumbing 
fixtures are properly connected or 
which constitute vent terminals, shall be 
permanently plugged or capped in an 
approved manner, using the appropriate 
materials required by this code. 

1 01 .4.1 .2 Maintenance. The plumbing and 
drainage system of any premises under the 
jurisdiction of the Authority Having 
Jurisdiction shall be maintained in a sanitary 
and safe operating condition by the owner 
or the owner's agent. 

101.4.1.3 Existing Construction. No 

provision of this code shall be deemed to 
require a change in any portion of a 
plumbing or drainage system or any other 
work regulated by this code in or 
on an existing building or lot when such 
work was installed and is maintained in 
accordance with law in effect prior to the 
effective date of this code, except when any 
such plumbing or drainage system or other 
work regulated by this code is determined 
by the Authority Having Jurisdiction to be | 
in fact dangerous, unsafe, insanitary, or a 
nuisance and a menace to life, health, or 
property. 

101.4.1.4 Conflicts Between Codes. 

When the requirements within the 
jurisdiction of this plumbing code conflict 
with the requirements of the mechanical 
code, this code shall prevail. 

101.4.2 Additions, alterations, repairs, and 
replacement of plumbing systems shall comply 
with the provisions for new systems except as 
otherwise provided in Section 101.5. 

101.4.3 The provisions in the appendices are 
intended to supplement the requirements of this 
code and shall not be considered part of this 
code unless formally adopted as such. 



101.5-102.2 



UNIFORM PLUMBING CODE 



101.5 Application to Existing Plumbing System. 

101.5.1 Additions, Alterations, or Repairs. 

Additions, alterations, or repairs may be made 
to any plumbing system without requiring the 
existing plumbing system to comply with all the 
requirements of this code, provided the 
addition, alteration, or repair conforms to that 
required for a new plumbing system. Additions, 
alterations, or repairs shall not cause an existing 
system to become unsafe, insanitary, or 
overloaded. 

101.5.2 Health and Safety. Whenever 
compliance with all the provisions of this code 
fails to eliminate or alleviate a nuisance, or any 
other dangerous or insanitary condition which 
may involve health or safety hazards, the owner 
or the owner's agent shall install such additional 
plumbing and drainage facilities or shall make 
such repairs or alterations as may be ordered by 
the Authority Having Jurisdiction. 

101.5.3 Existing Installation. Plumbing 
systems lawfully in existence at the time of the 
adoption of this code may have their use, 
maintenance, or repair continued if the use, 
maintenance, or repair is in accordance with the 
original design and location and no hazard to 
life, health, or property has been created by 
such plumbing system. 

101.5.4 Changes in Building Occupancy. 

Plumbing systems which are a part of any 
building or structure undergoing a change in 
use or occupancy, as defined in the Building 
code, shall com^ply to all requirements of this 
code which may be applicable to the new use or 
occupancy. 

101.5.5 Maintenance. All plumbing systems, 
materials, and appurtenances, both existing and 
new, and all parts thereof shall be maintained in 
proper operating condition. All devices or 
safeguards required by this code shall be 
maintained in conformance with the code 
edition under which installed. The owner or the 
owner's designated agent shall be responsible 
for maintenance of plumbing systems. To 
determine compliance with this subsection, 
the Authority Having Jurisdiction may cause 
any plumbing system to be reinspected. 

101.5.6 Moved Buildings. Plumbing systems 
which are part of buildings or structures moved 
into this jurisdiction shall comply with the 
provisions of this code for new installations 
except as provided for in Section 103.5.5.2. 



102.0 Organization and Enforcement. 

102.1 Authority Having Jurisdiction. 

The Authority Having Jurisdiction shall be the 
Authority duly appointed to enforce this code. 

102.2 Duties and Powers of the Authority Having 
Jurisdiction. 

102.2.1 The Authority Having Jurisdiction rriay 
appoint such assistants, deputies, inspectors, or 
other employees as are necessary to carry out the 
functions of the department and this code. 

102.2.2 Right of Entry. Whenever it is 
necessary to make an inspection to enforce the 
provisions of this code, or whenever the 
Authority Having Jurisdiction has reasonable 
cause to believe that there exists in any building 
or upon any premises, any condition or violation 
of this code which makes the building or 
premises unsafe, insanitary, dangerous, or 
hazardous, the Authority Having Jurisdiction 
may enter the building or premises at all 
reasonable times to inspect or to perform the 
duties imposed upon the Authority Having 
Jurisdiction by this code, provided that if such 
building or premises is occupied, the Authority 
Having Jurisdiction shall present credentials to 
the occupant and request entry. If such building 
or premises is unoccupied, the Authority 
Having Jurisdiction shall first make a reasonable 
effort to locate the owner or other person having 
charge or control of the building or premises and 
request entry. If entry is refused, the Authority 
Having Jurisdiction has recourse to every 
remedy provided by law to secure entry. 

When the Authority Having Jurisdiction 
shall have first obtained a proper inspection 
warrant or other remedy provided by law to 
secure entry, no owner, occupant, or person 
having charge, care, or control of any building or 
premises shall fail or neglect, after proper 
request is made as herein provided, to promptly 
permit entry herein by the Authority Having 
Jurisdiction for the purpose of inspection and 
examination pursuant to this code. 

102.2.3 Stop Orders. Whenever any work is 
being done contrary to the provisions of this 
code, the Authority Having Jurisdiction may 
order the work stopped by notice in writing 
served on any persons engaged in the doing or 
causing such work to be done, and any such 
persons shall forthwith stop work until 
authorized by the Authority Having Jurisdiction 
to proceed with the work. 

102.2.4 Authority to Disconnect Utilities in 
Emergencies. The Authority Having 
Jurisdiction shall have the authority to 



ADMINISTRATION 



102.2-103.2 



disconnect a plumbing system to a building, 
structure, or equipment regulated by this code 
in case of emergency where necessary to 
eliminate an immediate hazard to life or 
property. 

102.2.5 Authority to Condemn. Whenever the 
Authority Having Jurisdiction ascertains that 
any plumbing system or portion thereof, 
regulated by this code, has become hazardous 
to life, health, property, or has become 
insanitary, the Authority Having Jurisdiction 
shall order in writing that such plumbing either 
be removed or placed in a safe or sanitary 
condition, as appropriate. The order shall fix a 
reasonable time limit for compliance. No person 
shall use or maintain defective plumbing after 
receiving such notice. 

When such plumbing system is to be 
disconnected, written notice shall be given. In 
cases of immediate danger to life or property, 
such disconnection may be made immediately 
without such notice. 

102.2.6 Liability. The Authority Having 
Jurisdiction charged with the enforcement of this 
code, acting in good faith and without malice in 
the discharge of the Authority Having 
Jurisdiction's duties, shall not thereby be 
rendered personally liable for any damage that 
may accrue to persons or property as a result of 
any act or by reason of any act or omission in the 
discharge of duties. A suit brought against the 
Authority Having Jurisdiction or employee 
because of such act or omLission performed in the 
enforcement of any provision of this code shall 
be defended by legal counsel provided by this 
jurisdiction until final termination of such 
proceedings. 

102.3 Violations and Penalties. 

102.3.1 Violations. It shall be unlawful for any 
person, firm, or corporation to erect, construct, 
enlarge, alter, repair, move, improve, remove, 
convert, demolish, equip, use, or maintain any 
plumbing or permit the same to be done in 
violation of this code. 

102.3.2 Penalties. Any person, firm, or 
corporation violating any provision of this code 
shall be deemed guilty of a misdemeanor, and 
upon conviction thereof, shall be punishable by 
a fine and /or imprisonment set forth by the 
governing laws of the jurisdiction. Each separate 
day or any portion thereof, during which any 
violation of this code occurs or continues, shall 
be deemed to constitute a separate offense. 



103.0 Permits and Inspections. 

103.1 Permits. 

103.1.1 Permits Required. It shall be unlawful 
for any person, firm, or corporation to make any 
installation, alteration, repair, replacement, or 
remodel any plumbing system regulated by this 
code except as permitted in Section 103.1.2, or to 
cause the same to be done without first 
obtaining a separate plumbing permit for each 
separate building or structure. 

103.1.2 Exempt Work. A permit shall not be 
required for the following: 

103.1.2.1 The stopping of leaks in drains, 
soil, waste, or vent pipe, provided, however, 
that should any trap, drainpipe, soil, waste, 
or vent pipe become defective and it 
becomes necessary to remove and replace 
the same with new material, the same shall 
be considered as new work and a permit 
shall be procured and inspection made as 
provided in this code. 

103.1.2.2 (1) The clearing of stoppages, 
including the removal and reinstallation of 
water closets, or 

(2) the repairing of leaks in pipes, valves, or 
fixtures, provided such repairs do not 
involve or require the replacement or 
rearrangement of valves, pipes, or fixtures. 

Exemption from the permit requirements 
of this code shall not be deemed to grant 
authorization for any work to be done in 
violation of the provisions of the code or 
any other laws or ordinances of this 
jurisdiction. 

103.1.3 Licensing. As a result of an agreement 
between the Department of Housing and Urban 
Development (HUD) and lAPMO, the 
requirements for licensing have been removed 
from this section of the UPC. Provision for 
licensing shall be determined by the Authority 
Having Jurisdiction. 

103.2 Application for Permit. 

103.2.1 Application. To obtain a permit, the 
applicant shall first file an application therefor in 
writing on a form furnished by the Authority I 
Having Jurisdiction for that purpose. Every such | 
application shall: 

103.2.1 .1 Identify and describe the work to 
be covered by the permit for which 
application is made. 

103.2.1 .2 Describe the land upon which the 
proposed work is to be done by legal 
description, street address, or similar 



103.2-103.3 



UNIFORM PLUMBING CODE 



description that will readily identify 
and definitely locate the proposed building 
or work. 

103.2.1.3 Indicate the use or occupancy for 
which the proposed work is intended. 

103.2.1.4 Be accompanied by plans, 
diagrams, computations, and other data as 
required in Section 103.2.2. 

103.2.1.5 Be signed by permittee or the 
permittee's authorized agent, who may be 
required to submit evidence to indicate such 
authority. 

103.2.1.6 Give such other data and 
information as may be required by the 
Authority Having Jurisdiction. 

103.2.2 Plans and Specifications. Plans, 
engineering calculations, diagrams, and other 
data shall be submitted in one or more sets with 
each application for a permit. The Authority 
Having Jurisdiction may require plans, 
computations, and specifications to be prepared 
by and the plumbing designed by an engineer 
and /or architect licensed by the state to practice 
as such. 

Exception: The Authority Having 
Jurisdiction may waive the submission of 
plans, calculations, or other data if the 
Authority Having Jurisdiction finds that the 
nature of the work applied for is such that 
reviewing of plans is not necessary to obtain 
compliance within the code. 

103.2.3 Information on Plans and 
Specifications. Plans and specifications shall be 
drawn to scale upon substantial paper or cloth 
and shall be of sufficient clarity to indicate the 
location, nature, and extent of the work 
proposed and show in detail that it will coiiform 
to the provisions of this code and relevant laws, 
ordinances, rules, and regulations. 

103.3 Permit Issuance. 

103.3.1 Issuance. The application, plans, and 
specifications and other data filed by an 
applicant for a permit shall be reviewed by the 
Authority Having Jurisdiction. Such plans may 
be reviewed by other departments of this 
jurisdiction to verify compliance with applicable 
laws under their jurisdiction. If the Authority 
Having Jurisdiction finds that the work 
described in an application for permit and 
the plans, specifications, and other data filed 
therewith conform to the requirements of the 
code and other pertinent laws and ordinances, 
and that the fees specified in Section 103.4 have 



been paid, the Authority Having Jurisdiction | 
shall issue a permit therefor to the applicant. 

When the Authority Having Jurisdiction | 
issues the permit where plans are requited, the 
Authority Having Jurisdiction shall endorse in | 
writing or stamp the plans and specifications 
"APPROVED." Such approved plans and 
specifications shall not be changed, modified, or 
altered without authorization from the 
Authority Having Jurisdiction, and all work | 
shall be done in accordance with approved 
plans. 

The Authority Having Jurisdiction may | 
issue a permit for the construction of a part of a 
plumbing system before the entire plans and 
specifications for the whole system have been 
submitted or approved, provided adequate 
information and detailed statements have been 
filed complying with all pertinent requirements 
of this code. The holder of such permit may 
proceed at the holder's risk without assurance 
that the permit for the entire building, structure, 
or plumbing system will be granted. 

103.3.2 Retention of Plans. One set of 

approved plans, specifications, and computations 
shall be retained by the Authority Having 
Jurisdiction until final approval of the 
work covered therein. One set of approved plans 
and specifications shall be returned to the 
applicant, and said set shall be kept on the site of 
the building or work at all times during which 
the work authorized thereby is in progress. 

103.3.3 Validity of Permit. The issuance of a 
permit or approval of plans and specifications 
shall not be construed to be a permit for, or an 
approval of, any violation of any of the 
provisions of this code or of any other 
ordinance of the jurisdiction. No permit 
presuming to give authority to violate or cancel 
the provisions of this code shall be valid. 

The issuance of a permit based upon plans, 
specifications, or other data shall not prevent the 
Authority Having Jurisdiction front thereafter | 
requiring the correction of errors in said plans, 
specifications, and other data or from preventing 
building operations being carried on thereunder 
when in violation of this code or of other 
ordinances of this jurisdiction. 

103.3.4 Expiration. Every permit issued by the 
Authority Having Jurisdiction under the | 
provisions of this code shall expire by limitation 
and become null and void if the work 
authorized by such permiit is not commenced 
within one hundred eighty (180) days from the 
date of such permit, or if the work authorized by 



ADMINISTRATION 



103.3-103.4 



such permit is suspended or abandoned at any 
time after the work is commenced for a period of 
one hundred eighty (180) days. Before such 
work can be recommenced, a new permit shall 
first be obtained to do so, and the fee therefor 
shall be one-half the amount required for a new 
permit for such work, provided no changes have 
been made or will be made in the original plans 
and specifications for such work, and provided 
further that such suspensions or abandonment 
has not exceeded one year. 

Any permittee holding an unexpired permit 
may apply for an extension of the time within 
which work may commence under that permit 
when the permittee is unable to commence work 
within the time required by this section for good 
and satisfactory reasons. The Authority Having 
Jurisdiction may extend the time for action by 
the permittee for a period not exceeding one 
hundred eighty (180) days upon written request 
by the permittee showing that circumstances 
beyond the control of the permittee have 
prevented action from being taken. No permit 
shall be extended more than once. In order to 
renew action on a permit after expiration, the 
permittee shall pay a new full permit fee. 

103.3.5 Suspension or Revocation. The 

I Authority Having Jurisdiction may, in writing, 

suspend or revoke a permit issued under the 
provisions of this code whenever the permit is 
issued in error or on the basis of incorrect 
information supplied or in violation of other 
ordinance or regulation of the jurisdiction. 

103.4 Fees. 

103.4.1 Permit Fees. Fees shall be assessed in 
accordance with the provisions of this section 
and as set forth in the fee schedule Table 1-1. The 
fees are to be determined and adopted by this 
jurisdiction. 

103.4.2 Plan Review Fees. When a plan or 
other data is required to be submitted by Section 
103.2.2, a plan review fee shall be paid at the 
time of submitting plans and specifications for 
review. 

The plan review fees for plumbing work shall 
be determined and adopted by this jurisdiction. 

The plan review fees specified in this 
subsection are separate fees from the permit fees 
specified in this section and are in addition to 
the permit fees. 

When plans are incomplete or changed so as 
to require additional review, a fee shall be 
charged at the rate shown in Table 1-1. 



103.4.3 Expiration of Plan Review. 

Applications for which no permit is issued 
within one hundred eighty (180) days following 
the date of application shall expire by limitation, 
and plans and other data submitted for review 
may thereafter be returned to the applicant or 
destroyed by the Authority Having Jurisdiction. I 
The Authority Having Jurisdiction may exceed I 
the time for action by the applicant for a period 
not to exceed one hundred eighty (180) days 
upon request by the applicant showing that 
circumstances beyond the control of the 
applicant have prevented action from being 
taken. No application shall be extended more 
than once. In order to renew action on an 
application after expiration, the applicant shall 
resubmit plans and pay a new plan review fee. 

103.4.4 Investigation Fees: Work Without a 
Permit. 

103.4.4.1 Whenever any work for which a 
permit is required by this code has been 
commenced without first obtaining said 
permit, a special investigation shall be made 
before a permit may be issued for such 
work. 

103.4.4.2 An investigation fee, in addition 
to the permit fee, shall be collected whether 
or not a permit is then or subsequently 
issued. The investigation fee shall be equal 
to the amount of the permit fee that would 
be required by this code if a permit were to 
be issued. The payment of siich 
investigation fee shall not exempt any 
person from compliance with all other 
provisions of this code, nor from any 
penalty prescribed by law. 

103.4.5 Fee Refunds. 

103.4.5.1 The Authority Having i 
Jurisdiction may authorize the refunding of I 
any fee paid hereunder which was 
erroneously paid or collected. 

103.4.5.2 The Authority Having i 
Jurisdiction may authorize the refunding of | 
not more than a percentage, as determined 
by this jurisdiction when no work has been 
done under a permit issued in accordance 
with this code. 

103.4.5.3 The Authority Having i 
Jurisdiction shall not authorize the I 
refunding of any fee paid except upon 
written application filed by the original 
permittee not later than one hundred eighty 
(180) days after the date of fee payment. 



103.5 



UNIFORM PLUMBING CODE 



103.5 Inspections. 

103.5.1 General. All plumbing systems for 
which a permit is required by this code shall be 
inspected by the Authority Having Jurisdiction. 
No portion of any plumbing system shall be 
concealed until inspected and approved. Neither 
the Authority Having Jurisdiction nor the 
jurisdiction shall be liable for expense entailed in 
the removal or replacement of material required 
to permit inspection. When the installation of a 
plumbing system is complete, an additional and 
final inspection shall be made. Plumbing 
systems regulated by this code shall not be 
connected to the water, energy fuel supply, or 
the sewer system until authorized by the 
Authority Having Jurisdiction. 

103.5.1.1 Inspection. No water supply 
system or portion thereof shall be covered or 
concealed until it first has been tested, 
inspected, and approved. 

103.5.1.2 Scope. All new plumbing work 
and such portions of existing systems as 
may be affected by new work, or any 
changes, shall be inspected by the Authority 
Having Jurisdiction to insure compliance 
with all the requirements of this code and 
to assure that the installation and 
construction of the plumbing system is in 
accordance with approved plans. 

103.5.1.3 Covering or Using. No 

plumbing or drainage system, building 
sewer, private sewer disposal system, or 
part thereof, shall be covered, concealed, or 
put into use until it has been tested, 
inspected, and accepted as prescribed in this 
code. 

103.5.1.4 Uncovering. If any drainage or 
plumbing system, building sewer, private 
sewage disposal system, or part thereof, 
which is installed, altered, or repaired, is 
covered or concealed before being 
inspected, tested, and approved as 
prescribed in this code, it shall be 
uncovered for inspection after notice to 
uncover the work has been issued to the 
responsible person by the Authority Having 
Jurisdiction. 

103.5.2 Operation of Plumbing Equipment. 

The requirements of this section shall not be 
considered to prohibit the operation of any 
plumbing installed to replace existing 



equipment or fixtures serving an occupied 
portion of the building in the event a request for 
inspection of such equipment or fixture has been 
filed with the Authority Having Jurisdiction not | 
more than seventy-two (72) hours after such 
replacement work is completed, and before any 
portion of such plumbing system is concealed by 
any permanent portion of the building. 

103.5.3 Testing of Systems. All plumbing 
systems shall be tested and approved as 
required by this code or the Authority Having I 
Jurisdiction. I 

103.5.3.1 Test. Tests shall be conducted in 
the presence of the Authority Having 
Jurisdiction or the Authority Having 
Jurisdiction's duly appointed representative. 

103.5.3.2 Test Waived. No test or 
inspection shall be required where a 
plumbing system, or part thereof, is set up 
for exhibition purposes and has no 
connection with a water or drainage system. 

103.5.3.3 Exceptions. In cases where it 
would be impractical to provide the 
required water or air tests, or for minor 
installations and repairs, the Authority 
Having Jurisdiction may make such 
inspection as deemed advisable in order to 
be assured that the work has been 
performed in accordance with the intent of 
this code. 

103.5.3.4 Protectively Coated Pipe. 

Protectively coated pipe shall be inspected 
and tested, and any visible void, damage, or 
imperfection to the pipe coating shall be 
repaired to comply with Section 313.0 (see 
lAPMO IS-13, listed in Appendix I). 

103.5.3.5 Tightness. Joints and 
connections in the plumbing system shall be 
gastight and watertight for the pressures 
required by test. 

103.5.4 Inspection Requests. It shall be the 
duty of the person doing the work authorized by 
a permit to notify the Authority Having 
Jurisdiction that such work is ready for 
inspection. The Authority Having Jurisdiction 
may require that every request for inspection be 
filed at least one working day before such 
inspection is desired. Such request may be in 
writing or by telephone, at the option of the 
Authority Having Jurisdiction. | 



ADMINISTRATION 



103.5 -103.6 



It shall be the duty of the person 
requesting inspections required by this 
code to provide access to and means for 
proper inspection of such work. 

103.5.4.1 Advance Notice. It shall be 
the duty of the person doing the work 
authorized by the permit to notify the 
Authority Having Jurisdiction, orally or 
in writing, that said work is ready for 
inspection. Such notification shall be 
given not less than twenty-four (24) 
hours before the work is to be inspected. 

103.5.4.2 Responsibility. It shall be 
the duty of the holder of a permit to 
make sure that the work will stand the 
test prescribed before giving the 
notification. 

The equipment, material, and labor 
necessary for inspection or tests shall be 
furnished by the person to whom the 
permit is issued or by whom inspection 
is requested. 

103.5.5 Other Inspections. In addition to 
the inspections required by this code, the 
Authority Having Jurisdiction may require 
other inspections of any plumbing work to 
ascertain compliance with the provisions of 
this code and other laws which are enforced 
by the Authority Having Jurisdiction. 

103.5.5.1 Defective Systems. An air 

test shall be used in testing the sanitary 
condition of the drainage or plumbing 
system of any building premises when 
there is reason to believe that it has 
becom^e defective. In buildings or 
premises condemned by the proper 
Authority Having Jurisdiction because 
of an insanitary condition of the 
plumbing system or part thereof, the 
alterations in such system shall conform 
to the requirements of this code. 

103.5.5.2 Moved Structures. All parts 
of the plumbing systems of any 
building or part thereof that is moved 
from one foundation to another, or from 
one location to another, shall be 
completely tested as prescribed 
elsewhere in this section for new work, 
except that walls or floors need not be 
removed during such test when other 
equivalent means of inspection 
acceptable to the Authority Having 
Jurisdiction are provided. 



103.5.6 Reinspections. A reinspection fee 
may be assessed for each inspection or 
reinspection when such portion of work for 
which inspection is called is not complete or 
when required corrections have not been 
made. 

This provision is not to be interpreted as 
requiring reinspection fees the first time a 
job is rejected for failure to comply v/ith the 
requirements of this code, but as controlling 
the practice of calling for inspections before 
the job is ready for inspection or reinspection. 

Reinspection fees may be assessed when 
the approved plans are not readily available 
to the inspector, for failure to provide access 
on the date for which the inspection is 
requested, or for deviating from plans I 
requiring the approval of the Authority I 
Having Jurisdiction. 

To obtain reinspection, the applicant 
shall file an application therefor in writing 
upon a form furnished for that purpose and 
pay the reinspection fee in accordance with 
Table 1-1. 

In instances where reinspection fees 
have been assessed, no additional inspection 
of the work will be performed until the 
required fees have been paid. 

103.5.6.1 Corrections. Notices of 

correction or violation shall be written | 
by the Authority Having Jurisdiction 
and may be posted at the site of the 
work or mailed or delivered to the 
permittee or his authorized representative. 
Refusal, failure, or neglect to comply 
with any such notice or order within ten 
(10) days of receipt thereof, shall be 
considered a violation of this code and 
shall be subject to the penalties set forth 
elsewhere in this code for violations. 

103.5.6.2 Retesting. If the Authority 
Having Jurisdiction finds that the work 
will not pass the test, necessary 
corrections shall be made and the work 
shall then be resubmitted for test or 
inspection. 

103.5.6.3 Approval. Upon the 
satisfactory completion and final test of 
the plumbing system, a certificate of 
approval shall be issued by the 
Authority Having Jurisdiction to the 
permittee on demand. 

103.6 Connection Approval. 



103.6-103.8 



UNIFORM PLUMBING CODE 



103.6.1 Energy Connections. No person shall 
make connections from a source of energy or 
fuel to any plumbing system or equipment 
regulated by this code and for which a permit is 
required until approved by the Authority 
Having Jurisdiction. 

103.6.2 Other Connections. No person shall 
make connection from any water-supply line or 
shall connect to any sewer system regulated by 
this code and for which a permit is required 
until approved by the Authority Having 
Jurisdiction. 

103.6.3 Temporary Connections. The 

Authority Having Jurisdiction may authorize 
temporary connection of the plumbing 
equipment to the source of energy or fuel for the 
purpose of testing the equipment. 

103.7 Unconstitutionally. 

103.7.1 If any section, subsection, sentence, 
clause, or phrase of this code is, for any reason, 
held to be unconstitutional, such decision shall 
not affect the validity of the remaining portions 
of this code. The Legistative Body hereby 
declares that it would have passed this code, and 
each section, subsection, sentence, clause, or 
phrase thereof, irrespective of the fact that many 
one or more sections, subsections, sentences, 
clauses, and phrase to declared unconstitutional. 

103.8 Validity 

103.8.1 If any provision of this code, or the 
application thereof to any person or circumstance, 
is held invalid, the remainder of the code, or the 
application of such provision to other persons or 
circumstances, shall not be affected thereby. 

103.8.2 Wherever in this code reference is made 
to an appendix, the provisions in the appendix 
shall not apply unless specifically adopted. 



ADMINISTRATION Table 1-1 

TABLE 1-1 

Plumbing Permit Fees 
Permit Issuance 

1. For issuing eacli permit * 

2. For issuing each supplemental permit * 

Unit Fee Scliedule (in addition to items 1 and 2 above) 

1 . For each plumbing fixture on one trap or a set of fixtures on one trap (including water, 

drainage piping and backflow protection therefor) * 

2. For each building sewer and each trailer park sewer * 

3. Rainwater systems - per drain (inside building) * 

4. For each cesspool (where permitted) * 

5. For each private sewage disposal system * 

6. For each water heater and/or vent * 

7. For each gas-piping system of one to five outlets * 

8. For each additional gas piping system outlet, per outlet * 

9. For each industrial waste pretreatment interceptor including its trap and vent, 

except kitchen-type grease interceptors functioning as fixture traps * 

10. For each installation, alteration or repair of water piping and/or water treating equipment, each ...* 

11. For each repair or alteration of drainage or vent piping, each fixture * 

12. For each lawn sprinkler system on any one meter including backflow protection devices therefor * 

13. For atmospheric-type vacuum breakers not included in item 12: 

1 to 5 J. * 

overs, each * 

14. For each backflow protective device other than atmospheric type vacuum breakers: 

2 inch (51 mm) diameter and smaller * 

over 2 inch (51 mm) diameter * 

15. For each graywater system * 

16. For initial installation and testing for a reclaimed water system * 

17. For each annual cross-connection testing of a reclaimed water system (excluding initial test) * 

18. For each medical gas piping system serving one to five inlet(s)/outlet(s) for a specific gas * 

19. For each additional medical gas inlet(s)/outlet(s) * 

Otiier Inspections and Fees 

1. Inspections outside of normal business hours * 

2. Reinspection fee * 

3. Inspections for which no fee is specifically indicated * 

4. Additional plan review required by changes, additions or 

revisions to approved plans (minimum charge - one-half hour) * 

* Jurisdiction will indicate their fees here. 



UNIFORM PLUMBING CODE 



10 



CHAPTER 2 

DEFINITIONS 



201.0 General. 

For the purpose of this code, the following terms 
have the meanings indicated in this chapter. 

No attempt is made to define ordinary words 
which are used in accordance with their established 
dictionary meanings, except where a word has been 
used loosely and it is necessary to define its meaning 
as used in this code to avoid misunderstanding. 

The definitions of terms are arranged 
alphabetically according to the first word of the term. 

202.0 Definition of Terms. 



or other fluid under positive pressure which passes 
through an integral orifice or constriction, causing a 



203.0 



-A- 



ABS - Acrylonitrile-butadiene-styrene. 

Accessible - When applied to a fixture, connection, 
appliance, or equipment, "accessible" means having 
access thereto, but which first may require the 
removal of an access panel, door, or similar 
obstruction. "Readily accessible" means direct access 
without the necessity of removing any panel, door, 
or similar obstruction. 

Airbreak - A physical separation which may be a 
low inlet into the indirect waste receptor from the 
fixture, appliance, or device indirectly connected. 

Air Chamber - A pressure surge-absorbing device 
operating through the compressibility of air. 

Airgap, Drainage - The unobstructed vertical 
distance through the free atmosphere between the 
lowest opening from any pipe, plumbing fixture, 
appliance, or appurtenance conveying waste to the 
flood level rim of the receptor. 

Airgap, Water Distribution - The unobstructed 
vertical distance through the free atmosphere 
between the lowest opening from any pipe or faucet 
conveying potable water to the flood level rim of any 
tank, vat, or fixture. 

Anchors - See Supports. 

Approved - Acceptable to the Authority Having 
Jurisdiction. 

Approved Testing Agency - An organization 
primarily established for purposes of testing to 
approved standards and approved by the Authority 
Having Jurisdiction. 

Area Drain - A receptor designed to collect surface 

or storm water from an open area. 

Aspirator - A fitting or device supplied with water 



vacuum. 



Authority Having Jurisdiction - The organization, 
office, or individual responsible for enforcing the 
requirements of a code or standard, or for approving 
equipment, materials, installations, or procedures. 
The Authority Having Jurisdiction shall be a federal, 
state, local, or other regional department or an 
individual such as a plumbing official; mechanical 
official; labor department official, health department 
official, building official or others having statutory 
authority. In the absence of a statutory authority, the 
Authority Having Jurisdiction may be some other 
responsible party. This definition shall include the 
Authority Having Jurisdiction's duly authorized 
representative. 



204.0 



_B- 



Backflow - The flow of water or other liquids, 
mixtures, or substances into the distributing pipes of 
a potable supply of water from any sources other 
than its intended source. See Back-Siphonage, Back- 
Pressure Backflow. 

Backflow Connection - Any arrangement whereby 
backflow can occur. 

Back-Pressure Backflow - Backflow due to an 
increased pressure above the supply pressure, which 
may be due to pumps, boilers, gravity, or other 
sources of pressure. 

Backflow Preventer - A device or means to prevent 
backflow into the potable water system. 

Back-Siphonage - The flowing back of used, 
contaminated, or polluted water from a plumbing 
fixture or vessel into a water supply pipe due to a 
pressure less than atmospheric in such pipe. See 
Backflow. 

Backwater Valve - A device installed in a drainage 
system to prevent reverse flow. 

Bathroom - A room equipped with a shower or 
bathtub. 

Battery of fixtures - Any group of two (2) or more 
similar, adjacent fixtures which discharge into a 
common horizontal waste or soil branch. 

Boiler Blowoff - An outlet on a boiler to permit 
emptying or discharge of sediment. 

Branch - Any part of the piping system other than a 
main, riser, or stack. 



11 



204.0 - 205.0 



UNIFORM PLUMBING CODE 



Branch, Fixture - See Fixture Branch. 

Branch, Horizontal - See Horizontal Branch. 

Branch Vent - A vent connecting one or more 
individual vents with a vent stack or stack vent. 

Building - A structure built, erected, and framed of 
component structural parts designed for the housing, 
shelter, enclosure, or support of persons, animals, or 
property of any kind. 

Building Drain - That part of the lowest piping of a 
drainage system which receives the discharge from 
soil,. waste, and other drainage pipes inside the walls 
of the building and conveys it to the building sewer 
beginning two (2) feet (610 mm) outside the building 
wall. 

Building Drain (Sanitary) - A building drain which 
conveys sewage only. 

Building Drain (Storm) - A building drain which 
conveys storm water or other drainage, but no 
sewage. 

Building Sewer - That part of the horizontal piping 
of a drainage system which extends from the end of 
the building drain and which receives the discharge 
of the building drain and conveys it to a public 
sewer, private sewer, private sewage disposal 
system, or other point of disposal. 

Building Sewer (Combined) - A building sewer 
which conveys both sewage and storm water or 
other drainage. 

Building Sewer (Sanitary) - A building sewer 
which conveys sewage only. 

Building Sewer (Storm) - A building sewer which 
conveys storm water or other drainage, but no 
sewage. 

Building Subdrain - That portion of a drainage 
system which does not drain by gravity into the 
building sewer. 

Building Supply - The pipe carrying potable water 
from the water meter or other source of water supply 
to a building or other point of use or distribution on 
the lot. Building supply shall also mean water service. 

205.0 - C - 

Certified Backflow Assembly Tester - A person 
who has shown competence to test and maintain 
backflow assemblies to the satisfaction of the 
I Authority Having Jurisdiction. 

Cesspool - A lined excavation in the ground which 
receives the discharge of a drainage system or part 
thereof, so designed as to retain the organic matter 
and solids discharging therein, but permitting the 
liquids to seep through the bottom and sides. 

Chemical Waste - See Special Wastes. 



Clarifier - See Interceptor. 

Clear Water Waste - Cooling water and condensate 
drainage from refrigeration and air-conditioning 
equipment; cooled condensate from steam heating 
systems; cooled boiler blowdown water. 

Clinic Sink - A sink designed primarily to receive 
wastes from bedpans and having a flush rim, an 
integral trap with a visible trap seal, and the same 
flushing and cleansing characteristics as a water 
closet. 

Code - A standard that is an extensive compilation 
of provisions covering broad subject matter or that is 
suitable for adoption into law independently of other 
codes and standards. 

Combination Thermostatic/Pressure Balancing 
Valve - A mixing valve which senses outlet 
temperature and incoming hot and cold water 
pressure and compensates for fluctuations in 
incoming hot and cold water temperatures and /or 
pressures to stabilize outlet temperatures. 

Combination Waste and Vent System - A specially 
designed system of waste piping embodying the 
horizontal wet venting of one or more sinks or floor 
drains by means of a common waste and vent pipe, 
adequately sized to provide free movement of air 
above the flow line of the drain. 

Combined Building Sewer - See Building Sewer 
(Combined). 

Common - That part of a plumbing system which is 
so designed and installed as to serve more than one 
(1) appliance, fixture, building, or system. 

Conductor - A pipe inside the building which 
conveys storm water from the roof to a storm drain, 
combined building sewer, or other approved point of 
disposal. 

Confined Space - A room or space having a volutne 
less than fifty (50) cubic feet per 1000 Btu/h (1.4 
mV293 W) of the aggregate input rating of all fuel- 
burning appliances installed in that space. 

Contamination - An impairment of the quality of 
the potable water which creates an actual hazard to 
the public health through poisoning or through the 
spread of disease by sewage, industrial fluids, or 
waste. Also defined as High Hazard. 

Continuous Vent - A vertical vent that is a 
continuation of the drain to which it cormects. 

Continuous Waste - A drain connecting the 
compartments of a set of fixtures to a trap or 
connecting other permitted fixtures to a common trap. 

CPVC - Chlorinated Poly (Vinyl Chloride). 

Critical Level - The critical level (C-L or C/L) 
marking on a backflow prevention device or vacuum 
breaker is a point conforming to approved standards 



12 



DEFINITIONS 



205.0 - 209.0 



and established by the testing laboratory (usually 
stamped on the device by the manufacturer) which 
determines the minimum elevation above the flood 
level rim of the fixture or receptor served at which 
the device may be installed. When a backflow 
prevention device does not bear a critical level 
marking, the bottom of the vacuum breaker, 
combination valve, or the bottom of any such 
approved device shall constitute the critical level. 

Cross-Connection - Any connection or 
arrangement, physical or otherwise, between a 
potable water supply system and any plumbing 
fixture or any tank, receptor, equipment, or device, 
through which it may be possible for non-potable, 
used, unclean, polluted and contaminated water, or 
other substances to enter into any part of such 
potable water system under any condition. 



206.0 



-D- 



Department Having Jurisdiction - The Authority 
Having Jurisdiction, including any other law 
enforcement agency affected by any provision of this 
code, whether such agency is specifically named or not. 

Design Flood Elevation - See TIA on page vi. 

Developed Length - The length along the center 
line of a pipe and fittings. 

Dialysis Water System - See TIA on page vi. 

Diameter - Unless specifically stated, "diameter" is 
the nominal diameter as designated commercially. 

Domestic Sewage - The liquid and water-borne 
wastes derived from the ordinary living processes, 
free from industrial wastes, and of such character as 
to permit satisfactory disposal, without special 
treatment, into the public sewer or by means of a 
private sewage disposal system. 

Downspout - The rainleader from the roof to the 
building storm drain, combined building sewer, or 
other means of disposal located outside of the 
building. See Conductor and Leader. 

Drain ^ Any pipe which carries waste or water-borne 
wastes in a building drainage system. 

Drainage System - Includes all the piping within 
public or private premises which conveys sewage or 
other liquid wastes to a legal point of disposal, but 
does not include the mains of a public sewer system 
or a public sewage treatment or disposal plant. 

Durham System - A soil or waste system in which 
all piping is threaded pipe, tubing, or other such 
rigid construction, using recessed drainage fittings to 
correspond to the types of piping. 

207.0 - E - 

Effective Opening - The minimum cross-sectional 
area at the point of water supply discharge measured 



or expressed in terms of (1) diameter of a circle or (2) 
if the opening is not circular, the diameter of a circle 
of equivalent cross-sectional area. (This is applicable 
also to airgap.) 

Essentially Nontoxic Transfer Fluid - Essentially 
nontoxic at practically nontoxic. Toxicity Rating Class 
1 (reference "Clinical Toxicology of Commercial 
Products" by Gosselin, Smith, Hodge, & Braddock). 

Existing Work - A plumbing system or any part 
thereof which has been installed prior to the effective 
date of this code. 



208.0 



F- 



Flxture Branch - A water supply pipe between the 
fixture supply pipe and the water distributing pipe. 

Fixture Drain - The drain from the trap of a fixture to 
the junction of that drain with any other drain pipe. 

Fixture Supply - A water supply pipe connecting 
the fixture with the fixture branch. 

Fixture Unit - A quantity in terms of which the load- 
producing effects on the plumbing system of 
different kinds of plumbing fixtures are expressed on 
some arbitrarily chosen scale. 

Flammable Vapor or Fumes is the concentration of 
flammable constituents in air that exceeds 25 percent 
of its lower flammability limit (LFL). 

Flood Hazard Area - See TIA on page vi. 

Flood Hazard Area Subject to High Velocity Wave 
Action - See TIA on page vi. 

Flood Level - See Flooded. 

Flood-Level Rim - The top edge of a receptor from 
which water overflows. 

Flooded - A fixture is flooded when the liquid 
therein rises to the flood level rim. 

Flush Tank - A tank located above or integral with 
water closets, urinals, or similar fixtures for the 
purpose of flushing the usable portion of the fixture. 

Flush Valve - A valve located at the bottom of a 
tank for the purpose of flushing water closets and 
similar fixtures. 

Flushometer Tank - A tank integrated within an air 
accumulator vessel which is designed to discharge a 
predetermined quantity of water to fixtures for 
flushing purposes. 

Flushometer Valve - A valve which discharges a 
predetermined quantity of water to fixtures for 
flushing purposes and is actuated by direct water 
pressure. 

209.0 - G - 

Gang or Group Shower - Two or more showers in a 
common area. 

Grade - The slope or fall of a line of pipe in reference 
to a horizontal plane. In drainage, it is usually 



13 



209.0-214.0 



UNIFORM PLUMBING CODE 



expressed as the fall in a fraction of an inch (mm) or 
percentage slope per foot (meter) length of pipe. 

Grease Interceptor - An interceptor of at least 750 
gallon (2839 L) capacity to serve one (1) or more 
fixtures and which shall be remotely located. 

Grease Trap - A device designed to retain grease 
from one (1) to a maximum of four (4) fixtures. 



210.0 



-H- 



Hangers - See Supports. 

High Hazard - See Contamination. 

Horizontal Branch - A drain pipe extending 
laterally from a soil or waste stack or building drain 
with or without vertical sections or branches, which 
receives the discharge from one or more fixture 
drains and conducts it to the soil or waste stack or to 
the building drain. 

Horizontal Pipe - Any pipe or fitting which is 

installed in a horizontal position or which makes an 

angle of less than forty-five (45) degrees with the 

horizontal. 

House Drain - See Building Drain. 

House Sewer - See Building Sewer. 

211.0 -I- 

Indirect Waste Pipe - A pipe that does not connect 
directly with the drainage system but conveys liquid 
wastes by discharging into a plumbing fixture, 
interceptor, or receptacle which is directly connected 
to the drainage system. 

individual Vent - A pipe installed to vent a fixture 
trap and which connects with the vent system above 
the fixture served or terminates in the open air. 

Industrial Waste - Any and all liquid or water- 
borne waste from industrial or commercial 
processes, except domestic sew^age. 
Insanitary - A condition which is contrary to 
sanitary principles or is injurious to health. 

Conditions to which "insanitary" shall apply 
include the following: 

(1) Any trap which does not maintain a proper 
trap seal. 

(2) Any opening in a drainage system, except 
where lawful, which is not provided with an 
approved water-sealed trap. 

(3) Any plumbing fixture or other waste- 
discharging receptor or device, which is not 
supplied with water sufficient to flush and 
maintain the fixture or receptor in a clean 
condition. 



(4) Any defective fixture, trap, pipe, or fitting. 

(5) Any trap, except where in this code 
exempted, directly connected to a drainage 
system, the seal of which is not protected 
against siphonage and back-pressure by a 
vent pipe. 

(6) Any connection, cross-connection, construction, 
or condition, temporary or permanent, which 
would permit or make possible by any means 
whatsoever, for any unapproved foreign 
matter to enter a water distribution system 
used for domestic purposes. 

(7) The foregoing enumeration of conditions to 
which the term "insanitary" shall apply 
shall not preclude the application of that 
term to conditions that are, in fact, insanitary. 

Interceptor (Clarifier) - A device designed and 
installed so as to separate and retain deleterious, 
hazardous, or undesirable matter from normal 
wastes and permit normal sewage or liquid wastes to 
discharge into the disposal terminal by gravity. 

Invert - The lowest portion of the inside of a 
horizontal pipe. 

212.0 -J- 

Joint, Brazed - Any joint obtained by joining of 
metal parts with alloys which melt at temperatures 
higher than 840°F (449°C), but lower than the 
melting temperature of the parts to be joined. 

Joint, Soldered - A joint obtained by the joining of 
metal parts w^ith metalUc mixtures or alloys which rnelt 
at a temperature up to and including 840°F (449°C). 



213.0 

No definitions 



-K- 



214.0 -L- 

Labeled - Equipment or materials bearing a label of 
a listing agency (accredited conformity assessment 
body). See Listed (third party certified). 

Lavatories in Sets - Two (2) or three (3) lavatories 
that are served by one (1) trap. 

Leader - An exterior vertical drainage pipe for 
conveying storn\ water from roof or gutter drains. 
See Downspout. 

Liquid Waste - The discharge from any fixture, 
appliance, or appurtenance in connection with a 
plumbing system which does not receive fecal matter. 



14 



DEFINITIONS 



214.0-218.0 



Listed (Third party certified) - Equipment or 
materials included in a list published by a listing 
agency (accredited conformity assessment body) that 
maintains periodic inspection on current production 
of listed equipment or materials and whose listing 
states either that the equipment or material complies 
with approved standards or has been tested and 
found suitable for use in a specified maimer. 

Listing Agency - An agency accredited by an 
independent and authoritative conformity 
assessment body to operate a niaterial and product 
listing and labeling (certification) system and which 
is accepted by the Authority Having Jurisdiction 
which is in the business of listing or labeling. The 
system includes initial and ongoing product testing, 
a periodic inspection on current production of listed 
(certified) products, and which makes available a 
published report of such listing in which specific 
information is included that the material or product 
conforms to applicable standards and found safe for 
use in a specific manner. 

Lot - A single or individual parcel or area of land 
legally recorded or validated by other means 
I acceptable to the Authority Having Jurisdiction on 
I which is situated a building or which is the site of 
any work regulated by this code, together with the 
yards, courts, and unoccupied spaces legally 
required for the building or works, and which is 
owned by or is in the lawful possession of the owner 
of the building or works. 

Low Hazard - See Pollution. 



215.0 -IVI- 

Maceratlng Toilet System - A system comprising of 
a sump with macerating pump and with connections 
for a water closet and other plumbing fixtures, which 
is designed to accept, grind, and pump wastes to an 
approved point of discharge. 

IVIain - The principal artery of any system of 
continuous piping to which branches may be 
connected. 

IVIain Sewer - See Public Sewer. 

Main Vent - The principal artery of the venting 
system to which vent branches may be cormected. 

May - A permissive term. 

Mobile Home Park Sewer - That part of the 
horizontal piping of a drainage system which begins 
two (2) feet (610 mm) downstream from the last 
mobile home site and conveys it to a public sewer, 
private sewer, private sewage disposal system, or 
other point of disposal. 



216.0 -N- 

Nuisance - Includes, but is not limited to: 

(1) Any public nuisance known at common law 
or in equity jurisprudence. 

(2) Whenever any work regulated by this code 
is dangerous to human life or is detrimental to 
health and property. 

(3) Inadequate or unsafe water supply or 
sewage disposal system. 

217.0 -O- 

Offset - A combination of elbows or bends in a line 
of piping which brings one section of the pipe out of 
line but into a line parallel with the other section. 

Oil Interceptor - See Interceptor. 



218.0 



-P- 



PB - Polybutylene. 

PE - Polyethylene. 

P E- A L- P E - Polyethylene-aluminum-polyethylene . I 

PEX - Cross-linked polyethylene. 

PEX-AL-PEX - Cross-linked polyethylene — 
aluminum-cross-linked polyethylene. 

Person - A natural person, his heirs, executor, 
administrators, or assigns and shall also include a 
firm, corporation, municipal or quasi-municipal 
corporation, or governmental agency. Singular 
includes plural, male includes female. 

Pipe - A cylindrical conduit or conductor 
conforming to the particular dimensions commonly 
known as "pipe size." 

Plumbing - The business, trade, or work having to 
do with the installation, removal, alteration, or repair 
of plumbing systems or parts thereof. 

Plumbing Appliance - Any one of a special class of 
devices or equipment which is intended to perform a 
special plumbing function. Its operation and /or 
control may be dependent upon one or more 
energized components, such as motors, controls, 
heating elements, or pressure- or temperature- 
sensing elements. Such device or equipment may 
operate automatically through one or more of the 
following actions: a time cycle, a temperature range, 
a pressure range, a measured volume or weight; or 
the device or equipment may be manually adjusted 
or controlled by the user or operator. 

Plumbing Appurtenance - A manufactured device, 
a prefabricated assembly, or an on-the-job assembly 
of component parts, which is an adjunct to the basic 
piping system and plumbing fixtures. An 
appurtenance demands no additional water supply. 



15 



218.0-220.0 



UNIFORM PLUMBING CODE 



nor does it add any discharge load to a fixture or the 
drainage system. It performs some useful function in 
the operation, maintenance, servicing, economy, or 
safety of the plumbing system. 

Plumbing Fixture - An approved-type installed 
receptacle, device, or appliance which is supplied 
with water or which receives liquid or liquid-borne 
wastes and discharges such wastes into the drainage 
system to which it may be directly or indirectly 
connected. Industrial or commercial tanks, vats, and 
similar processing equipment are not plumbing 
fixtures, but may be connected to or discharged into 
approved traps or plumbing fixtures when and as 
otherwise provided for elsewhere in this code. 

Plumbing Official - See Authority Having 
Jurisdiction. 

Plumbing System - Includes all potable water, 
building supply, and distribution pipes, all 
plumbing fixtures and traps, all drainage and vent 
pipes, and all building drains and building sewers, 
including their respective joints and connections, 
devices, receptors, and appurtenances within the 
property lines of the premises and shall include 
potable water piping, potable water treating or using 
equipment, medical gas and medical vacuum 
systems, liquid and fuel gas piping, and water 
heaters and vents for same. 

Pollution - An impairment of the quality of the 
potable water to a degree which does not create a 
hazard to the public health but which does adversely 
and unreasonably affect the aesthetic qualities of 
such potable water for domestic use. Also defined as 
Low Hazard. 

Potable Water - Water that is satisfactory for 
drinking, culinary, and domestic purposes and that 
meets the requirements of the Health Authority 
Having Jurisdiction. 

PP - Polypropylene. 

Pressure - The normal force exerted by a 
homogeneous liquid or gas, per unit of area, on the 
wall of the container. 

(1) Static Pressure - The pressure existing 
without any flow. 

(2) Residual Pressure - The pressure available 
at the fixture or water outlet after allowance is 
made for pressure drop due to friction loss, 
head, meter, and other losses in the system 
during maximum demand periods. 

Pressure Balancing Valve - A mixing valve which 
senses incoming hot and cold water pressures and 
compensates for fluctuations in either to stabilize 
outlet temperature. 

Private or Private Use - Applies to plumbing 



fixtures in residences and apartments, to private 
bathrooms in hotels and hospitals, and to restrooms 
in commercial establishments where the fixtures are 
intended for the use of a family or an individual. 

Private Sewage Disposal System - A septic tar\k 
with the effluent discharging into a subsurface 
disposal field, into one or more seepage pits, or into 
a com.bination of subsurface disposal field and 
seepage pit or of such other facilities as may be 
permitted under the procedures set forth elsewhere 
in this code. 

Private Sewer - A building sewer which receives 
the discharge from more than one (1) building drain 
and conveys it to a public sewer, private sewage 
disposal system, or other point of disposal. 

Public or Public Use - All buildings or structures 
that are not defined as private or private use. 

Public Sewer - A common sewer directly controlled 
by public authority. 

PVC - Poly(vinyl chloride). 



219.0 

No definitions. 



-Q- 



220.0 - R - 

Receptor - An approved plumbing fixture or device 
of such material, shape, and capacity as to 
adequately receive the discharge from indirect waste 
pipes, so constructed and located as to be readily 
cleaned. 

Regulating Equipment - Includes all valves and 
controls used in a plumbing system which are 
required to be accessible or readily accessible. 

Relief Vent - A vent, the primary function of which 
is to provide circulation of air between drainage and 
vent systems or to act as an auxiliary vent on a 
specially designed system. 

Remote Outlet - When used for sizing water piping, 
it is the furthest outlet dimension, measuring from 
the meter, either the developed length of the cold- 
water piping or through the water heater to the 
furthest outlet on the hot-water piping. 

Rim - See Flood-Level Rim. 

Riser - A water supply pipe which extends 
vertically one (1) full story or more to convey water 
to branches or fixtures. 

Roof Drain - A drain installed to receive water 
collecting on the surface of a roof and to discharge it 
into a leader, downspout, or conductor. 

Roughing-ln - The installation of all parts of the 
plumbing system which can be completed prior to 
the installation of fixtures. This includes drainage. 



16 



DEFINITIONS 



220.0 - 222.0 



water supply, gas piping, and vent piping and the 
necessary fixture supports. 

221.0 -S- 

Sand Interceptor - See Interceptor. 

SDR - An abbreviation for "standard dimensional 
ratio," which is the specific ratio of the average 
specified outside diameter to the minimum wall 
thickness for outside controlled diameter plastic 
pipe- 
Seepage Pit - A lined excavation in the ground 
which receives the discharge of a septic tank so 
designed as to permit the effluent from the septic 
tank to seep through its bottom and sides. 

Septic Tanit - A watertight receptacle which 
receives the discharge of a drainage system or part 
thereof, designed and constructed so as to retain 
solids, digest organic matter through a period of 
detention, and allow the liquids to discharge into the 
soil outside of the tank through a system of open 
joint piping or a seepage pit meeting the 
requirements of this code. 

Sewage - Any liquid waste containing animal or 
vegetable matter in suspension or solution and that 
may include liquids containing chemicals in solution. 

Sewage Ejector - A device for lifting sewage by 
entraining it on a high-velocity jet stream, air, or 
water. 

Sewage Pump - A permanently installed 
mechanical device, other than an ejector, for 
removing sewage or liquid waste from a sump. 

I Sliall - Indicates a mandatory requirement. 

Shielded Coupling - An approved elastomeric 
sealing gasket with an approved outer shield and a 
tightening mechanism. 
Shock Arrester - See Water Hammer Arrester. 

Should - Indicates a recommendation or that which 
is advised but not required. 

Single Family Dwelling - A building designed to be 
used as a home by the owner of such building, which 
shall be the only dwelling located on a parcel of 
ground with the usual accessory buildings. 

Size and Type of Tubing - See Diameter. 
Slip Joint - An adjustable tubing connection, 
consisting of a compression nut, a friction ring, and a 
compression washer, designed to fit a threaded 
adapter fitting, or a standard taper pipe thread. 

Slope - See Grade. 

Soil Pipe - Any pipe which conveys the discharge 
of water closets, urinals, clinic sinks, or fixtures 
having similar functions of collection and removal 



of domestic sewage, with or without the discharge 
from other fixtures, to the building drain or 
building sewer. 

Special Wastes - Wastes which require some 
special method of handling, such as the use of 
indirect waste piping and receptors, corrosion 
resistant piping, sand, oil or grease interceptors, 
condensers, or other pretreatment facilities. 

Stack - The vertical main of a system of soil, 
waste, or vent piping extending through one or 
more stories. 

Stack Vent - The extension of a soil or waste stack 
above the highest horizontal drain connected to 
the stack. 

Standard — A document, the main text of which 
contains only mandatory provisions using the 
word "shall" to indicate requirements and which is 
in a form generally suitable for mandatory 
reference by another standard or code or for 
adoption into law. Nonmandatory provisions shall 
be located in an appendix, footnote, or fine-print 
note and are not to be considered a part of the 
requirements of a standard. 
Storm Drain - See Building Drain (Storm). 

Storm Sewer - A sewer used for conveying 
rainwater, surface water, condensate, cooling water, 
or similar liquid wastes. 

Subsoil Drain - A drain which collects subsurface or 
seepage water and conveys it to a place of disposal. 

Sump - An approved tank or pit which receives 
sewage or liquid waste and which is located below 
the normal grade of the gravity system and which 
must be emptied by mechanical means. 

Supports - Supports, hangers, and anchors are 
devices for properly supporting and securing pipe, 
fixtures, and equipment. 

222.0 - T - 

Tailpiece - The pipe or tubing that connects the 
outlet of a plumbing fixture to a trap. 

Thermostatic (Temperature Control) Valve - A 

mixing valve which senses outlet temperature and 
compensates for fluctuations in incoming hot or cold 
water temperatures. 

Trap - A fitting or device so designed and 
constructed as to provide, when properly vented, a 
liquid seal which will prevent the back passage of air 
without materially affecting the flow of sewage or 
waste water through it. 

Trap Arm - That portion of a fixture drain between a 
trap and the vent. 



17 



222.0 - 228.0 



UNIFORM PLUMBING CODE 



Trap Primer - A device and system of piping that 
maintains a water seal in a remote trap. 

Trap Seal - The vertical distance between the crown 
weir and the top dip of the trap. 

Crown Weir (Trap Weir) -The lowest point in 
the cross section of the horizontal waterway at 
the exit of the trap. 

Top Dip (of trap) - The highest point in the 
internal cross section of the trap at the lowest 
part of the bend (inverted siphon). By contrast, 
the bottom dip is the lowest point in the internal 
cross section. 

223.0 - U - 

Unconfined Space - A room or space having a 
volume equal to at least 50 cubic feet per 1000 Btu/h 
(1.4 mV293 W) of the aggregate input rating of all 
fuel-burning appliances installed in that space. 
Rooms communicating directly with the space in 
which the appliances are installed, through openings 
not furnished with doors, are considered a part of 
the unconfined space. 

Unsanitary - See Insanitary. 



224.0 



-V- 



Vacuum - Any pressure less than that exerted by the 
atmosphere. 

Vacuum Breaker - See Backflow Preventer. 

Vacuum Relief Valve - A device that prevents 
excessive vacuum in a pressure vessel. 

Vent - Any pipe provided to ventilate a plumbing 
system, to prevent trap siphonage and back pressure, 
or to equalize the air pressure within the drainage 
system. 

Vent Pipe - See Vent. 

Vent Stack - The vertical vent pipe installed 
primarily for the purpose of providing circulation of 
air to and from any part of the drainage system. 

Vent System - A pipe or pipes installed to provide a 
flow of air to or from a drainage system or to 
provide a circulation of air within such system to 
protect trap seals from siphonage and back-pressure. 

Vertical Pipe - Any pipe or fitting which is installed 
in a vertical position or which makes an angle of not 
more than forty-five (45) degrees with the vertical. 

225.0 - W - 

Wall-Hung Water Closet - A water closet installed 
in such a way that no part of the water closet touches 
the floor. 

Waste - See Liquid Waste and Industrial Waste. 



Waste Pipe - A pipe which conveys only liquid 
waste, free of fecal matter. 

Water Conditioning or Treating Device - A device 
which conditions or treats a water supply so as to 
change its chemical content or remove suspended 
solids by filtration. 

Water-Distributing Pipe - In a building or premises, 
a pipe which conveys potable water from the 
building supply pipe to the plumbing fixtures and 
other water outlets. 

Water Hammer Arrester - A device to absorb 
hydraulic shock, either of the air chamber or 
mechanical device design. 

Water Main (Street Main) - A water supply pipe for 
public or community use. 

Water Supply System - The building supply pipe, 
the water distributing pipes and the necessary 
connecting pipes, fittings, control valves, backflow 
prevention devices, and all appurtenances carrying 
or supplying potable water in or adjacent to the 
building or premises. 

Welded Joint or Seam - Any joint or seam obtained 
by the joining of metal parts in the plastic molten 
state. 

Welder, Pipe - A person who specializes in the 
welding of pipes and holds a valid certificate of 
competency from a recognized testing laboratory, 
based on the requirements of the ASME Boiler and 
Pressure Vessels code. Section IX. 

Wet Vent - A vent which also serves as a drain. 

Whirlpool Bathtub - A bathtub fixture equipped 
and fitted with a circulating piping system designed 
to accept, circulate, and discharge bathtub water 
upon each use. 



226.0 

No definitions. 

227.0 



-X- 



-Y- 



Yoke Vent - A pipe connecting upward from a soil 
or waste stack to a vent stack for the purpose of 
preventing pressure changes in the stacks. 



228.0 

No definitions. 



-Z- 



18 



CHAPTER 3 

GENERAL REGULATIONS 



301 .0 Materials - Standards and Alternates. 

301.1 Minimum Standards. 

301.1.1 Approvals. All pipe, pipe fittings, 
traps, fixtures, material, and devices used in a 
plumbing system shall be listed or labeled 
(third-party certified) by a listing agency 
(accredited conformity assessment body) and 
shall conform to approved applicable recognized 
standards referenced in this code, and shall be 
free from defects. Unless otherwise provided for 
in this code, all materials, fixtures, or devices 
used or entering into the construction of 
plumbing systems, or parts thereof, shall be 
submitted to the Authority Having Jurisdiction 
for approval. 

301.1.2 Marking. Each length of pipe and each 
pipe fitting, trap, fixture, material, and device 
used in a plumbing system shall have cast, 
stamped, or indelibly marked on it the 
manufacturer's mark or name which shall 
readily identify the manufacturer to the end user 
of the product when such marking is required 
by the approved standard that applies. When 
required by the approved standard that applies 
the product shall be marked with the weight and 
the quality of the product. All materials and 
devices used or entering into the construction of 
plumbing and drainage systems, or parts thereof, 
shall be marked and identified in a manner 
satisfactory to the Authority Having Jurisdiction. 
All such marking shall be done by the 
manufacturer. Field marking shall not be 
acceptable. 

301 .1 .3 Standards. Standards listed or referred 
to in this chapter or other chapters cover 
materials which will conform to the 
requirements of this code, when used in 
accordance with the limitations imposed in this 
or other chapters thereof and their listing. 
Where a standard covers materials of various 
grades, weights, quality, or configurations, there 
may be only a portion of the listed standard 
which is applicable. Design and materials for 
special conditions or materials not provided for 
herein may be used only by special permission 
of the Authority Having Jurisdiction after the 
Authority Having Jurisdiction has been satisfied 
as to their adequacy. A list of accepted plumbing 
materials standards is included in Table 14-1. 
All lAPMO Installation Standards are included 
in Appendix I for the convenience of the users 
of this code. They are not considered as a part of 
this code unless formally adopted as such by the 
Authority Having Jurisdiction. 



301.1.4 Existing Buildings. In existing 
buildings or premises in which plumbing 
installations are to be altered, repaired, or 
renovated, the Authority Having Jurisdiction has 
discretionary powers to permit deviation from 
the provisions of this code, provided that such a 
proposal to deviate is first submitted for proper 
determination in order that health and safety 
requirements, as they pertain to plumbing, shall 
be observed. 

301.2 Alternate Materials and Methods 
Equivalency. Nothing in this code is intended 
to prevent the use of systems, methods, or 
devices of equivalent or superior quality, 
strength, fire resistance, effectiveness, durability, 
and safety over those prescribed by this code. 
Technical documentation shall be submitted to 
the Authority Having Jurisdiction to 
demonstrate equivalency. The system, method, 
or device shall be approved for the intended 
purpose by the Authority Having Jurisdiction. 

301.2.1 Intent. The provisions of this code 
are not intended to prevent the use of any 
alternate material or method of construction 
provided any such alternate has been first 
approved and its use authorized by the 
Authority Having Jurisdiction. | 

However, the exercise of this 
discretionary approval by the Authority 
Having Jurisdiction shall have no effect 
beyond the jurisdictional boundaries of said 
Authority Having Jurisdiction. Any | 
alternate material or method of construction 
so approved shall not be considered as 
conforming to the requirements and /or 
intent of this code for any purpose other 
than installation or use within the 
jurisdiction granting the exception. 

301.2.2 Compliance. The Authority 
Having Jurisdiction may approve any such 
alternate provided that the Authority 
Having Jurisdiction finds that the proposed 
design is satisfactory and complies with the 
intent of this code and the material offered 
is for the purpose intended, at least the 
equivalent of that prescribed in this code, in 
quality, strength, effectiveness, durability, 
and safety or that the methods of installation 
proposed conform to other acceptable 
nationally recognized plumbing standards. 

301.2.3 Requirements. The Authority 
Having Jurisdiction shall require that 
sufficient evidence or proof be submitted to 



19 



301 .2 - 309.0 



UNIFORM PLUMBING CODE 



substantiate any claims that may be made 
regarding the sufficiency of any proposed 
material or type of construction. 

301.2.4 Testing. When there is 
insufficient evidence to substantiate claims 
for alternates, the Authority Having 
Jurisdiction shall have the authority to 
require tests, as proof of equivalency 
compliance, to be made by an approved 
testing agency at the expense of the applicant. 

301.2.4.1 Tests shall be made in 
accordance with approved standards, 
but in the absence of such standards, the 
Authority Having Jurisdiction shall 
specify the test procedure. 

301.2.4.2 The Authority Having 
Jurisdiction may require tests to be 
made or repeated if, at any time, there is 
reason to believe that any material or 
device no longer conforms to the require- 
ments on which its approval was based. 

301.3 Flood Hazard Resistance. (See TIA on page vi) 

301 .3.1 General. (See TIA on page vi) 

301.3.2 Flood Hazard Areas Subject to High 
Velocity Wave Action. (See TIA on page vi) 

302.0 Iron Pipe Size (IPS) Pipe. 

Iron, steel, brass, and copper pipe shall be standard 
weight iron pipe size (IPS) pipe. 

303.0 Disposal of Liquid Waste. 

It shall be unlawful for any person to cause, suffer, 
or permit the disposal of sewage, human excrement, 
or other liquid wastes, in any place or manner, 
except through and by means of an approved 
drainage system, installed and maintained in 
accordance with the provisions of this code. 

304.0 Connections to Plumbing System Required. 

All plumbing fixtures, drains, appurtenances, and 
appliances, used to receive or discharge liquid 
wastes or sewage, shall be connected properly to the 
drainage system of the building or premises, in 
accordance with the requirements of this code. 

305.0 Sewers Required. 

305.1 Every building in which plumbing fixtures 
are installed shall have a connection to a public or 
private sewer except as provided in Section 305.2. 

305.2 When a public sewer is not available for use, 
drainage piping from buildings and premises shall 
be connected to an approved private sewage 
disposal system. 

305.3 In cities and/or counties where the 
installation of building sewers is under the 



jurisdiction of a department other than the Authority 
Having Jurisdiction, the provisions of this code 
relating to building sewers need not apply. 

306.0 Damage to Drainage System or Public 
Sewer. 

306.1 It shall be unlawful for any person to deposit, 
by any means whatsoever, into any plumbing 
fixture, floor drain, interceptor, sump, receptor, or 
device, which is connected to any drainage system, 
public sewer, private sewer, septic tank, or cesspool, 
any ashes; cinders; solids; rags; inflammable, 
poisonous, or explosive liquids or gases; oils; grease; 
or any other thing whatsoever which would, or 
could, cause damage to the drainage system or 
public sewer. 

306.2 Roofs, inner courts, vent shafts, light wells, or 
similar areas having rainwater drain, shall discharge 
to the outside of the building or to the gutter and 
shall not be connected to the sanitary drainage 
system unless first approved by the Authority I 
Having Jurisdiction. | 

307.0 Industrial Wastes. 

307.1 Wastes detrimental to the public sewer system 
or detrimental to the functioning of the sewage 
treatment plant shall be treated and disposed of as 
found necessary and directed by the Authority I 
Having Jurisdiction or other Authority Having I 
Jurisdiction. I 

307.2 Sewage or other waste from a plumbing 
system which may be deleterious to surface or 
subsurface waters, shall not be discharged into the 
ground or into any waterway unless it has first been 
rendered safe by some acceptable form of treatment 
as required by the Authority Having Jurisdiction. | 

308.0 Location. 

308.1 Except as otherwise provided in this code, no 
plumbing system, drainage system, building sewer, 
private sewage disposal system, or parts thereof 
shall be located in any lot other than the lot which is 
the site of the building, structure, or premises served 
by such facilities. 

308.2 No subdivision, sale, or transfer of ownership 
of existing property shall be made in such manner 
that the area, clearance, and access requirements of 
this code are decreased. 



309.0 Improper Location. 

Piping, fixtures, or equipment shall not be so located 
as to interfere with the normal use thereof or with 
the normal operation and use of windows, doors, or 
other required facilities. 



20 



GENERAL REGULATIONS 



310.0-313.6 



310.0 Workmanship. 

310.1 All design, construction, and workmanship 
shall be in conformity with accepted engineering 
practices and shall be of such character as to secure 
the results sought to be obtained by this code. 

31 0.2 It is unlawful to conceal cracks, holes, or other 
imperfections in materials by welding, brazing, or 
soldering or by using therein or thereon any paint, 
wax, tar, or other leak-sealing or repair agent. 

310.3 Burred ends of all pipe and tubing shall be 
reamed to the full bore of the pipe or tube and all 
chips shall be removed. 

310.4 Installation Practices. Plumbing systems shall 
be installed in a manner conforming to this code, 
applicable standards, and the manufacturer's 
installation instructions. In instances where the code, 
applicable standards, or the manufacturer's instructions 
conflict, the more stringent provisions shall prevail. 

31 1 .0 Prohibited Fittings and Practices. 

311.1 No double hub fitting, single or double tee 
branch, single or double tapped tee branch, side inlet 
quarter bend, running thread, band, or saddle shall 
be used as a drainage fitting, except that a double 
hub sanitary tapped tee may be used on a vertical 
line as a fixture connection. 

31 1 .2 No drainage or vent piping shall be drilled 
and tapped for the purpose of making connections 
thereto, and no cast-iron soil pipe shall be threaded. 

31 1 .3 No waste connection shall be made to a closet 
bend or stub of a water closet or similar fixture. 

31 1 .4 Except as hereinafter provided in Sections 908.0, 
909.0 and 910.0, no vent pipe shall be used as a soil or 
waste pipe, nor shall any soil or waste pipe be used as 
a vent. Also, single stack drainage and venting 
systems, with unvented branch lines are prohibited. 

311.5 No fitting, fixture and piping connection, 
appliance, device, or method of installation which 
obstructs or retards the flow of water, wastes, 
sewage, or air in the drainage or venting systems, in 
an amount greater than the normal frictional 
resistance to flow, shall be used unless it is indicated 
as acceptable in this code or is approved by the 

I Authority Having Jurisdiction as having a desirable 
and acceptable function and of ultimate benefit to 
the proper and continuing functioning of the 
plumbing system. The enlargement of a three (3) 
inch (80 mm) closet bend or stub to four (4) inches 
(100 mm) shall not be considered an obstruction. 

311.6 Except for necessary valves, where 
intermembering or mixing of dissimilar metals 
occurs, the point of connection shall be confined to 
exposed or accessible locations. 

31 1 .7 All valves, pipes, and fittings shall be installed 
in correct relationship to the direction of flow. 



31 1 .8 Screwed Fittings. Screwed fittings shall be 
ABS, cast iron, copper, copper alloy, malleable iron, 
PVC, steel, or other approved materials. Threads 
shall be tapped out of solid metal or molded in solid 
ABS or PVC. 



312.0 Independent Systems. 

The drainage system of each new building and of new 
work installed in any existing building shall be 
separate and independent from that of any other 
building and when available, every building shall 
have an independent connection with a public or 
private sewer. 

Exception: Where one building stands in the 
rear of another building on an interior lot, and 
no private sewer is available or can be 
constructed to the rear building through an 
adjoining court, yard, or driveway, the building 
drain from the front building may be extended 
to the rear building. 

313.0 Protection of Piping, l\/lateriaDs, and 
Structures. 

313.1 All piping passing under or through walls 
shall be protected from breakage. All piping passing 
through or under cinders or other corrosive 
materials shall be protected from external corrosion 
in an approved manner. Approved provisions shall 
be made for expansion of hot water piping. Voids 
around piping passing through concrete floors on 
the ground shall be appropriately sealed. 

313.2 All piping in connection with a plumbing 
system shall be so installed that piping or 
connections will not be subject to undue strains or 
stresses, and provisions shall be made for expansion, i 
contraction, and structural settlement. No plumbing | 
piping shall be directly embedded in concrete or 
masonry. No structural member shall be seriously 
w^eakened or impaired by cutting, notching, or 
otherwise, as defined in the Building Code. 

313.3 All trenches deeper than the footing of any 
building or structure and paralleling the same shall 
be at least forty-five (45) degrees (0.79 rad) 
therefrom, unless permission be otherwise granted 
by the Authority Having Jurisdiction. | 

313.4 No building sewer or other drainage piping 
or part thereof, constructed of materials other than 
those approved for use under or within a building, 
shall be installed under or within two (2) feet (610 
mm) of any building or structure, or less than one (1) 
foot (305 mm) below the surface of the ground. 

313.5 Piping subject to corrosion, erosion, or -< 
mechanical damage shall be protected in an 
approved manner. 

31 3.6 No water, soil, or waste pipe shall be installed 
or permitted outside of a building or in an exterior 



21 



313.6-315.2 



UNIFORM PLUMBING CODE 



wall unless, where necessary, adequate provision is 
made to protect such pipe from freezing. 

313.7 All piping penetrations of fire-resistance-rated 
walls, partitions, floors, floor /ceiling assemblies, 
roof /ceiling assemblies, or shaft enclosures shall be 
protected in accordance with the requirements of the 
Building Code, lAPMO Installation Standards, and 
Chapter 15, "Firestop Protection." 

313.8 Waterproofing of Openings. Joints at the 
roof around pipes, ducts, or other appurtenances 
shall be made watertight by the use of lead, copper, 
galvanized iron, or other approved flashings or 
flashing material. Exterior wall openings shall be 
made watertight. Counterflashing shall not restrict 
the required internal cross-sectional area of the vent. 

313.9 Plastic and copper piping run through 
framing members to within one (1) inch (25.4 mm) of 
the exposed framing shall be protected by steel nail 
plates not less than 18 gauge. 

Exception: See Section 1211.3.4. 

313.10 Sleeves. 

313.10.1 Sleeves shall be provided to protect all 
piping through concrete and masonry walls. 

313.10.2 Piping through concrete or masonry 
walls shall not be subject to any load from 
building construction. 

313.10.3 In exterior walls, annular space between 
sleeves and pipes shall be sealed and made 
watertight as approved by the Authority Having 
Jurisdiction. Any penetration through fire- 
resistive construction shall be in accordance with 
Section 313.7. 

313.10.4 Any pipe sleeve through a firewall shall 
have the space around the pipe completely 
sealed with an approved fire-resistive material 
in accordance with all other codes. 

313.11 Any structural member weakened or 
impaired by cutting, notching, or otherwise shall be 
reinforced, repaired, or replaced so as to be left in a 
safe structural condition in accordance with the 
requirements of the Building Code or as required by 
the proper Authority Having Jurisdiction. 

313.12 Ratproofing. 

313.12.1 Strainer plates on drain inlets shall be 
designed and installed so that no opening is 
greater than one-half (1/2) inch (12.7 mm) in the 
least dimension. 

313.12.2 Meter boxes shall be constructed in 
such a marvner that rats cannot enter a building 
by following the service pipes from the box into 
the building. 

313.12.3 In or on buildings where openings 
have been made in walls, floors, or ceilings for 



the passage of pipes, such openings shall be 
closed and protected by the installation of 
approved metal collars securely fastened to the 
adjoining structure. 

314.0 Hangers and Supports. 

314.1 Suspended piping shall be supported at 
intervals not to exceed those shown in Table 3-2. 

314.2 All piping shall be supported in such a 
manner as to maintain its alignment and prevent 
sagging. 

314.3 Piping in the ground shall be laid on a firm 
bed for its entire length. Where support is otherwise 
provided, it shall be otherwise provided, it shall be 
acceptable to the Authority Having Jurisdiction. 

314.4 Hangers and anchors shall be of sufficient 
strength to support the weight of the pipe and its 
contents. Piping shall be isolated from incompatible 
materials. 

314.5 All piping, fixtures, appliances, and 
appurtenances shall be adequately supported in 
accordance with this code and the manufacturer's 
installation instructions and as approved by the 
Authority Having Jurisdiction. 

314.5.1 In seismic zones 3 and 4, hubless cast 
iron piping in sizes five (5) inches (125 mm) and 
larger suspended in exposed locations over 
public or high traffic areas, pipe over four (4) 
feet (1219 mm) in length shall be provided with 
support on both sides of the coupling. 

314.6 Hanger rod sizes shall be no smaller than 
those shown in Table 3-1. 

314.7 All gas piping shall be supported by metal 
straps or hooks at intervals not to exceed those 
shown in Table 3-2. 

TABLE 3-1 
Hanger Rod Sizes 



Pipe and Tube Size 
Inches mm 



1/2-4 

5-8 

10-12 



12.7-102 
127 - 203 
254 - 305 



Rod Size 
Inches mm 




315.0 Trenching, Excavation, and Backfill. 

315.1 All trenches deeper than the footing of any 
building or structure and paralleling the same shall 
be at least forty-five (45) degrees (0.79 rad) 
therefrom, unless permission is otherwise granted by 
the Authority Having Jurisdiction. 

31 5.2 Tunneling and driving may be done in yards, 
courts, or driveways of any building site. Where 
sufficient depth is available to permit, tunnels may 



22 



GENERAL REGULATIONS 



315.2-316.1 



be used between open-cut trenches. Tunnels shall 
have a clear height of two (2) feet (610 mm) above 
the pipe and shall be limited in length to one-half 
(1/2) the depth of the trench, with a maximum 
length of eight (8) feet (2438 mm). When pipes are 
driven, the drive pipe shall be at least one (1) size 
larger than the pipe to be laid. 

315.3 Open Trenches. All excavations required 
to be made for the installation of a building 
drainage system or any part thereof, within the 
walls of a building, shall be open trench work and 
shall be kept open until the piping has been 
inspected, tested, and accepted. 

315.4 All excavations shall be completely backfilled 
as soon after inspection as practicable. Adequate 
precaution shall be taken to insure proper 
compactness of backfill around piping without 
damage to such piping. Trenches shall be backfilled 
in thin layers to twelve (12) inches (305 mm) above 
the top of the piping with clean earth, which shall 
not contain stones, boulders, cinderfill, frozen earth, 
construction debris, or other materials which would 
damage or break the piping or cause corrosive 
action. Mechanical devices such as bulldozers, 
graders, etc., may then be used to complete backfill 
to grade. Fill shall be properly compacted. Suitable 
precautions shall be taken to insure permanent 
stability for pipe laid in filled or made ground. 

316.0 Joints and Connections. 

316.1 Types of Joints. 

31 6.1 .1 Tlireaded Joints. Threads on iron pipe 
size (IPS) pipe and fittings shall be standard 
taper pipe threads in accordance with standards 
listed in Table 14-1. Threads on tubing shall be 
approved types. Threads on plastic pipe shall be 
factory cut or molded. Threaded plastic pipe 
shall be Schedule 80 minimum wall thickness. 
Tubing threads shall conform to fine tubing 
thread standards. When a pipe joint material is 
used, it shall be applied only on male threads, 
and such materials shall be approved types, 
insoluble in water and nontoxic. Cleanout plugs 
and caps shall be lubricated with water- 
insoluble, non-hardening material or tape. 
Thread tape or thread lubricants and sealants 
specifically intended for use with plastics shall 
be used on plastic threads. Conventional pipe 
thread compounds, putty, linseed-oil-based 
products, and unknown lubricants and sealants 
shall not be used on plastic threads. 

316.1.2 Wiped Joints. Joints in lead pipe or 
fittings or between lead pipe or fittings and brass 
or copper pipe, ferrules, solder nipples, or traps 
shall be full-wiped joints. Wiped joints shall 



have an exposed surface on each side of a joint 
not less than three-fourths (3/4) inch (19.1 mm) 
and at least as thick as the material being joined. 
Wall or floor flange lead-wiped joints shall be 
made by using a lead ring or flange placed 
behind the joint at wall or floor. Joints between 
lead pipe and cast iron, steel, or wrought iron 
shall be made by means of a caulking ferrule 
or soldering nipple. 

316.1.3 Soldered Joints. Joints in copper 
tubing shall be made by the appropriate use of 
approved copper or copper alloy fittings. 
Surfaces to be joined by soldering shall be 
cleaned bright by manual or mechanical means. 
The joints shall be properly fluxed with an 
approved type flux and made up with approved 
solder. All solder and fluxes shall be 
manufactured to approved standards. Solders 
and fluxes with a lead content which exceeds 
two-tenths (0.20) of one (1) percent shall be 
prohibited in piping systems used to convey 
potable water. 

316.1.4 Flared Joints. Flared joints for soft 
copper tubing shall be made with fittings 
meeting approved standards. The tubing shall 
be reamed to the full inside diameter, resized to 
round, and expanded with a proper flaring tool. 

316.1.5 Flexible Compression Factory- 
Fabricated Joints. When pipe is joined by 
means of flexible compression joints, such 
joints shall conform to approved standards 
and shall not be considered as slip joints. 

316.1.6 Solvent Cement Plastic Pipe Joints. 

Plastic pipe and fittings designed to be joined by 
solvent cementing shall comply with appropriate 
lAPMO Installation Standards. 

ABS pipe and fittings shall be cleaned and 
then joined with solvent cement(s). 

CPVC pipe and fittings shall be cleaned and 
then joined with listed primer(s) and solvent 
cement(s). 

Exception: Listed solvent cements that do not 
require the use of primer shall be permitted 
for use with CPVC pipe and fittings, 
manufactured in accordance with ASTM 
D2846, 1 /2 inch through 2 inches in diamieter. 

PVC pipe and fittings shall be cleaned and 
joined with primer(s) and solvent cement(s). 

316.1.7 Brazing and Welding. Brazing and 
welding shall conform to the applicable 
standard(s) in Table 14-1. All brazing on 
medical gas systems shall be performed by 
certified installers meeting the requirements of 
ANSI/ASME Boiler and Pressure Vessel Code, 
Section IX, Welding and Brazing Qualifications 



23 



316.1-319.0 



UNIFORM PLUMBING CODE 



or AWS B2.2, Standard for Brazing Procedure 
and Performance Qualifications. 

316.1.8 Pressure-Lock Type Connection. 

This is mechanical connection which depends on 
an internal retention device to prevent pipe or 
tubing separation. Connection is made by 
inserting the pipe or tubing into the fitting to a 
prescribed depth. 

316.1.9 Pressed Fitting. This is a mechanical 
connection for joining copper tubing which uses 
a crimping tool to affix the O-ring seal copper or 
copper alloy fitting to the tubing. The tubing 
shall be inserted into the fitting, and the crimp 
shall be made using the tool reconvmended by 
the manufacturer. 

316.2 SpecialJoints. 

316.2.1 Copper Tubing to Screw Pipe Joints. 

Joints from copper tubing to threaded pipe shall be 
made by the use of brass adapter fittings. The joint 
between the copper tubing and the fitting shall be 
properly soldered, and the connection between 
the threaded pipe and the fitting shall be made 
with a standard pipe size screw joint. Solder 
shall conform to the requirements of Section 316.1.3. 

316.2.2 Unions. Approved unions may be used 
in drainage work when accessibly located in the 
trap seal or between a fixture and its trap in the 
vent system, except underground or in wet vents 
at any point in the water supply system, and in 
gas piping as permitted by Section 1211.3.2(4). 

316.2.3 Plastic Pipe to Other l\yiaterials. When 
connecting plastic pipe to other tjrpes of piping, only 
approved types of fittings and adapters designed 
for the specific transition intended shall be used. 

316.3 Flanged Fixture Connections. 

316.3.1 Fixture connections between drainage 
pipes and water closets and floor outlet service sinks 
and urinals shall be made by means of approved 
brass, hard lead, ABS, PVC, or iron flanges 
caulked, soldered, solvent cemented; rubber 
compression gaskets; or screwed to the drainage 
pipe. The connection shall be bolted with an 
approved gasket, washer, or setting compound 
between the fixture and the connection. The bottom 
of the flange shaU be set on an approved firm base. 

316.3.2 Closet bends or stubs shall be cut off so as 
to present a smooth surface even with the top of 
the closet ring before rough inspection is called. 

316.3.3 Wall-mounted water closet fixtures shall 
be securely bolted to an approved carrier fitting. 
The connecting piping between the carrier fitting 
and the fixture shall be an approved material 
and designed to accommodate an adequately 
sized gasket. Gasket material shall be neoprene, 
felt, or similar approved types. 

316.4 Prohibited Joints and Connections. 
316.4.1 Drainage System. Any fitting or 



connection which has an enlargement, chamber, 
or recess with a ledge, shoulder or reduction of 
pipe area that offers an obstruction to flow 
through the drain shall be prohibited. 

316.4.2 No fitting or connection that offers 
abnormal obstruction to flow shall be used. The 
enlargement of a three (3) inch (80 mm) closet 
bend or stub to four (4) inches (100 mm) shall 
not be considered an obstruction. 

317.0 Increasers and Reducers. 

Where different sizes of pipes or pipes and fittings 
are to be connected, the proper size increasers or 
reducers or reducing fittings shall be used between 
the two sizes. Brass or cast-iron body cleanouts shall 
not be used as a reducer or adapter from cast-iron 
drainage pipe to iron pipe size (IPS) pipe. 

318.0 Food-Handling Establishments. 

Food or drink shall not be stored, prepared, or 
displayed beneath soil or drain pipes, unless those 
areas are protected against leakage or condensation 
from such pipes reaching the food or drink as 
described below. Where building design requires 
that soil or drain pipes be located over such areas, 
the installation shall be made with the least possible 
number of joints and shall be installed so as to 
connect to the nearest adequately sized vertical stack 
with the provisions as follows: 

318.1 All openings through floors over such 
areas shall be sealed watertight to the floor 
construction. 

318.2 Floor and shower drains installed above 
such areas shall be equipped with integral 
seepage pans. 

318.3 All other soil or drain pipes shall be of an 
approved material as listed in Table 14-1 and Section 
701.0. All materials shall conform to established 
standards. Cleanouts shall be extended through the 
floor construction above. 

318.4 Soil and drain pipes located above such areas 
shall be subjected to a standing water test 
of not less than twenty-five (25) feet (7620 mm). 

318.5 Piping subject to operation at temperatures 
that will form condensation on the exterior of the 
pipe shall be thermally insulated. 

318.6 Where pipes are installed in ceilings above 
such areas, the ceiling shall be of the removable 
type, or shall be provided with access panels in order 
to form a ready access for inspection of piping. 

318.7 In lieu of the above, any other method may be 
approved by the Authority Having Jurisdiction. 

319.0 Test Gauges. Tests required by this code, 
which are performed utilizing dial gauges, shall be 



24 



GENERAL REGULATIONS 



31 9.0 -Table 3-2 



limited to gauges having the following pressure 
graduations or incrementations. 

31 9.1 Required pressure tests of ten (10) psi (69 kPa) 
or less shall be performed with gauges of 1/10 
pound (0.7 kPa) incrementation or less. 

319.2 Required pressure tests exceeding ten (10) 
pounds (69 kPa) but less than one hundred (100) 
psi (689 kPa) shall be performed with gauges of 
one (1) psi (6.9 kPa) incrementation or less. 

319.3 Required pressure tests exceeding one 
hundred (100) psi (689 kPa) shall be performed with 



gauges incremented for two (2) percent or less of the 
required test pressure. 

319.4 Test gauges shall have a pressure range not 
greater than twice the test pressure applied. 

320.0 Medical Gas and Vacuum Systems. All such 
piping shall be installed, tested, and verified in 
compliance with the appropriate consensus 
standards referenced in Chapter 14 and the 
requirements of Chapter 13. The Authority Having 
Jurisdiction shall require evidence of the competency 
of the installers and verifiers. 



TABLE 3-2 
Hangers and Supports 



Materials 



Types of Joints 



Horizontal 



Vertical 



Cast 



Lead and Oakum 



5 feet (1524 mm), except may be 
10 feet (3048 mm) where 10 foot 
lengths are installed ''^'^ 



Base and each floor not to 
exceed 15 feet (4572 mm) 





Compression Gasket 


Every other joint, unless over 4 feet 
(1219 mm), then support each joint ^'^-^ 


Base and each floor not to 
exceed 1 5 feet (4572 mm) 


Cast-Iron Hubbless 


Shielded Coupling 


Every other joint, unless over 4 feet 
(1219 mm), then support each joint ^"^ 


Base and each floor not to 
exceed 15 feet (4572 mm) 


Copper Tube and Pipe 


Soldered or Brazed 


1-1/2 inches (40 mm) and smaller, 6 feet 
(1829 mm), 2 inches (50 mm) and larger, 
10 feet (3048 mm) 


Each floor, not to exceed 
10 feet (3048 mm)= 


Steel and Brass Pipe for 
Water or DWV 


Threaded or Welded 


3/4 inch (20 mm) and smaller, 10 feet 
(3048 mm), 1 inch (25 mm) and larger, 
12 feet (3658 mm) 


Every other floor, not to 
exceed 25 feet (7620 mm)= 



Steel, Brass, and Tinned Threaded or Welded 
Copper Pipe for Gas 



1/2 inch (15 mm), 6 feet (1829 mm), 
3/4 inch (20 mm) and 1 inch (25.4 mm), 
8 feet (2438 mm, 1-1/4 inch (32 mm) 
and larger, 10 feet (3048 mm) 



1/2 inch (12.7 mm), 6 feet 
(1 829 mm), 3/4 inch (19 mm) 
and 1 inch (25.4 mm), 8 
feet (2438 mm), 1-1/4 
every floor level 



Schedule 40 PVC and 
ABS DWV 



Solvent Cemented 



All sizes, 4 feet (1219 mm). Allow for 
expansion every 30 feet (9144 mm)^^ 



Base and each floor. Provide 
midstory guides. Provide 
for expansion every 30 
feet (9144 mm)^ 



CPVC 


Solvent Cemented 


1 inch (25 mm) and smaller, 3 feet 
(914 mm), 1-1/4 inch (932 mm) and 
larger, 4 feet (1219 mm) 


Base and each floor. Provide 
midstory guides ^ 


Lead 


Wiped or Burned 


Continuous Support 


Not to exceed 4 feet 
(1219 mm) 


Copper 


Mechanical 


In accodance with standards acceptable to the Authority Having Jurisdiction 


Steel and Brass 


Mechanical 


In accordance with standards acceptable to the Authority Having Jurisdiction 


PEX 


Metal Insert and 
Metal Compression 


32 inches (800 mm) 


Base and each floor. 
Provide midstory guides 


PEX-AL-PEX 


Metal Insert and 
Metal Compression 


.I/O- u /..o V ^ All sizes 
1/2 inch (12 mm) 1 qq :_-u-. 

3/4 inch (20 mm) V fo^Lo s 
1 inch (25 mm) J (2489 mm) 


Base and each floor. 
Provide midstory guides 


PE-AL-PE 


Metal Insert and 
Metal Compression 
1 inch (25 mm) 


1/2 inch (12 mm) 1 A" sizes 
3/4 inch (20 mm) f 98 inches 
J (2489 mm) 


Base and each floor. 
Provide midstory guides 



Support adjacent to joint, not to exceed eighteen (18) inches (457 mm). 

Brace at not more than forty (40) foot (12,192 mm) intervals to prevent horizontal movement. 

Support at each horizontal branch connection. 

Hangers shall not be placed on the coupling. 

Vertical water lines may be supported in accordance with recognized engineering principles with regard to expansion and contraction, when first 

approved by the Authority Having Jurisdiction. 

See the appropriate lAPMO Installation Standard for expansion and other special requirements. 



25 



UNIFORM PLUMBING CODE 



26 



CHAPTER 4 

PLUMBING FIXTURES AND FIXTURE FITTINGS 



401.0 Materials - General Requirements. 

401.1 Quality of Fixtures. Plumbing fixtures shall 
be constructed of dense, durable, non-absorbent 
materials and shall have smooth, impervious surfaces, 
free from unnecessary concealed fouling surfaces. 
Except as permitted elsewhere in this code, all fixtures 
shall conform in quality and design to nationally 
recognized applicable standards or to other approved 

(standards acceptable to the Authority Having 
Jurisdiction. A list of accepted plumbing fixture 
standards is included in Table 14-1. 

401.2 Lead. See Table 14-1. Sheet lead shall be not 
less than the following: 

For safe pans - not less than four (4) pounds per 
square foot (19.5 kg/m^) or 1/16 inch (1.6 mm) thick. 

402.0 Water-Conserving Fixtures and Fittings. 

402.1 Flush volumes for low consumption and 
water saver water closets and urinals shall be in 
accordance with applicable standards referenced 
in Table 14-1. 

402.2 Water Closets. Water closets, either flush 
tank, flushometer tank, or flushometer valve 
operated, shall have an average consumption of 
not more than 1.6 gallons (6.1 liters) of water per flush. 

402.3 Urinals. Urinals shall have an average 
water consumption of not more than 1.0 gallon 
(3.8 liters) of water per flush. 

Exception: If approved by the Authority 
Having Jurisdiction, blowout urinals may be 
installed for public use in stadiums, race courses, 
fairgrounds, and other structures used for 
outdoor assembly and for similar uses. 

402.4 Metered Faucets. Self-closing or self- 
closing metering faucets shall be installed on 
lavatories intended to serve the transient public, 
such as those in, but not limited to, service 
stations, train stations, airports, restaurants, and 
convention halls. Metered faucets shall deliver 
not more than 0.25 gallons (1.0 liter) of water per use. 

402.5 Emergency Safety Showers. Emergency 
safety showers shall not be limited in their water 
supply flow rates. 

402.6 Installation. Water-conserving fixtures 
shall be installed in strict accordance with the 
manufacturers' instructions to maintain their 
rated performance. 



403.0 Materials - Alternates. 

Special use fixtures shall be made of one of the 
following: 

(A) Soapstone 

(B) Chemical stoneware 

(C) Copper-based alloy 

(D) Nickel-based alloy 

(E) Corrosion-resistant steel 

(F) Other materials lined with lead 

(G) Other materials suited for the intended use of the 
fixture. 

403.1 Zinc Alloy Components. Zinc alloy 
components shall meet the applicable nationally 
recognized standards and shall be used in 
accordance with their listing. 

404.0 Overflows. 

When any fixture is provided with an overflow, the 
waste shall be so arranged that the standing water in 
the fixture cannot rise in the overflow when the 
stopper is closed or remain in the overflow when the 
fixture is empty. The overflow pipe from a fixture 
shall be connected on the house or inlet side of the 
fixture trap, except that overflow on flush tanks may 
discharge into the water closets or urinals served by 
them, but it shall be unlawful to connect such 
overflows with any other part of the drainage system. 

405.0 Strainers and Connections. 

405.1 Strainers. All plumbing fixtures, other 
than water closets and urinals, shall be equipped 
with approved strainers having an approved 
waterway area. Strainers serving shower drains 
shall have a waterway equivalent to the area of 
the tailpiece. 

405.2 Connections. Fixtures having concealed 
slip joint connections shall be provided with an 
access panel or utility space at least twelve (12) 
inches (305 mm) in its least dimension and so 
arranged without obstructions as to make such 
connections accessible for inspection and repair. 

405.3 Continuous wastes and fixture tailpieces 
shall be constructed from the materials specified 
in Section 701.0 for drainage piping, provided, 
however, that such connections where exposed 
or accessible may be of seamless drawn brass 

not less than No. 20 B&S Gauge (0.032 inches) 
(0.8 mm). Each such tailpiece, continuous waste. 



27 



405.3 - 408.7 



UNIFORM PLUMBING CODE 



or waste and overflow shall not be less than one 
and one-half (1-1/2) inches (40 mm) CD. for sinks, 
dishwashers, laundry tubs, bathtubs, urinals, and 
similar fixtures, and not less than one and one-quarter 
(1-1/4) inches (32 mm) for lavatories, drinking 
fountains, and similar small fixtures. 

405.4 Approved wye or other directional type 
branch fittings shall be installed in all 
continuous wastes connecting or receiving the 
discharge from food waste disposal units, 
dishwashers, clothes washers, or other force 
discharge fixtures or appliances. No dishwasher 
drain shall be connected to a sink tailpiece, 
continuous waste or trap on the discharge side 
of a food waste disposal unit. 

406.0 Prohibited Fixtures. 

406.1 Water closets having an invisible seal or 
an unventilated space or having walls which are 
not thoroughly washed at each discharge shall 
be prohibited. Any water closet which might 
permit siphonage of the contents of the bowl 
back into the tank shall be prohibited. Drinking 
fountains shall not be installed in public toilet rooms. 

406.2 Proliibited Urinals. Floor-type and wall-hung- 
type trough urinals shall be prohibited. Urinals which 
have an invisible seal or which have an unventilated 
space or wall which is not thoroughly washed at each 
discharge shall be prohibited. 

406.3 Fixed wooden, concrete, cement, or tile 
wash trays or sinks for domestic use shall not be 
installed in any building designed or used for 
human habitation. No sheet-metal-lined wooden 
bathtub shall be installed or reconnected. No dry 
or chemical closet (toilet) shall be installed in 
any building used for human habitation, unless 
first approved by the Health Officer. 

406.4 Concealed Fouling Surfaces. Fixtures 
shall be so designed that they are free from 
concealed fouling surfaces. 

407.0 Special Fixtures and Specialties. 

407.1 Water Connections. Baptisteries, 
ornamental and lily ponds, aquaria, ornamental 
fountain basins, and similar constructions when 
provided with water supplies shall be protected from 
back-siphonage. 

407.2 Restaurant kitchen and other special use 
sinks may be made of approved type bonderized 
and galvanized sheet steel of not less than No. 16 U.S. 
Gauge (0.0625 inches) (1.6 mm). All sheet-metal 
plumbing fixtures shall be adequately designed, 
constructed, and braced in an approved manner to 
satisfactorily accomplish their intended purpose. 



407.3 Approved. Specialties requiring water and 
waste connections shall be submitted for approval of 
the Authority Having Jurisdiction. | 

408.0 Installation. 

408.1 Cleaning. Plumbing fixtures shall be installed 
in a manner to afford easy access for repairs and 
cleaning. Where practical, all pipes from fixtures shall 
be run to the nearest wall. 

408.2 Joints. Where a fixture comes in contact with 
the wall or floor, the joint between the fixture and the 
wall or floor shall be made watertight. 

408.3 Securing Fixtures. Floor-outlet or floor- 
mounted fixtures shall be rigidly secured to the 
drainage connection and to the floor when so 
designed, by screws or bolts of copper, brass, or other 
equally corrosion-resistant material. 

408.4 Wall-Hung Fixtures. Wall-himg fixtures shall 
be rigidly supported by n\etal supporting members so 
that no strain is transmitted to the connections. Flush 
tanks and similar appurtenances shall be secured by 
approved non-corrosive screws or bolts. 

408.5 Securing Floor-Mounted, Back-Outlet 
Water Closet Bowls. Floor-mounted, back-outlet 
water closet bowls shall be set level with an angle of 
ninety (90) degrees (1.58 rad) between the floor and 
wall at the centerline of the fixture outlet. The floor 
and wall shall have a flat mounting surface for at least 
five (5) inches (127 mm) to the right and left of the 
fixture outlet centerline. The fixture shall be secured to 
the wall outlet flange or drainage connection and to 
the floor by corrosion-resistant screws or bolts. The 
closet flange shall be secured to a firm base. 

Where floor-mounted, back-outlet water closets 
are used, the soil pipe shall not be less than three (3) 
inches (80 mm) in diameter. Offset, eccentric, or 
reducing floor flanges shall not be used. 

408.6 Setting. Fixtures shall be set level and in 
proper alignment with reference to adjacent walls. 
No water closet or bidet shall be set closer than 
fifteen (15) inches (381 mm) from its center to any 
side wall or obstruction nor closer than thirty (30) 
inches (762 mm) center to center to any similar 
fixture. The clear space in front of any water closet or 
bidet shall not be less than twenty-four (24) inches 
(610 mm). No urinal shall be set closer than twelve 
(12) inches (305 mm) from its center to any side wall 
or partition nor closer than twenty-four (24) inches 
(610 mm) center to center. 

408.7 Installations for the Handicapped. Where 
facilities for the handicapped are required in 
applicable building regulations, the facilities shall be 
installed in accordance with those regulations. 



28 



PLUMBING FIXTURES AND FIXTURE FITTINGS 



408.8-412.2 



408.8 Supply Fittings. The supply lines or fittings 
for every plumbing fixture shall be so installed as to 
prevent backflow as required in Chapter 6. 

409.0 Water Closets. 

409.1 Water closet bowls for public use shall be of the 
elongated type. In nurseries, schools, and other similar 
places where plumbing fixtures are provided for the 
use of children under six (6) years of age, water closets 
shall be of a size and height suitable for children's use. 
All water closets shall be equipped with seats as 
required below. 

409.2 Water Closet Seats. 

409.2.1 Water closet seats shall be of smooth 
non-absorbent material. 

409.2.2 All water closet seats, except those 
within dwelling units, shall be of the open front 
type. 

409.2.3 Water closet seats shall be properly 
sized for the water closet bowl type. 

409.2.4 Seats for use in public buildings shall 
conform to the standard listed in Table 14-1. 

410.0 Urinals. 

Every water supply to a urinal shall be protected by 
an approved type vacuum breaker or other 
approved backflow prevention device as described 
in Section 603.3. 

411.0 Flushing Devices for Water Closets and 
Urinals. 

411.1 Flushing Devices Required. Each water 
closet, urinal, clinic sink, or other plumbing fixture 
which depends on trap siphonage to discharge its 
waste contents shall be provided with a flushometer 
valve, flushometer tank, or flush tank designed and 
installed so as to supply water in sufficient quantity 
and rate of flow to flush the contents of the fixture to 
which it is connected, to cleanse the fixture, and to 
refill the fixture trap, without excessive water use. 
Flushing devices shall meet anti-siphon requirements 
required in Chapter 6. 

411.2 Automatic Flushing Tanks. Tanks flushing 
more than one (1) urinal shall be automatic in 
operation and of sufficient capacity to provide the 
necessary volume to flush and properly cleanse all 
urinals simultaneously. Automatically controlled 
flushometer valves may be substituted for flush tanks. 

411.3 Flushometer Valves. No manually 
controlled flushometer valve shall be used to flush 
more than one (1) urinal, and each such urinal 
flushometer valve shall be an approved, self-closing 



type discharging a predetermined quantity of water. 
Flushometers shall be installed so that they will be 
accessible for repair. Flushometer valves shall not be 
used where the water pressure is insufficient to 
properly operate them. When the valve is operated, it 
shall complete the cycle of operation automatically, 
opening fully and closing positively under the line 
water pressure. Each flushometer shall be provided 
with a means for regulating the flow through it. 

41 1 .4 Water Supply for Flush Tanks. An adequate 
quantity of water shall be provided to flush and clean 
the fixture served. The water supply for flushing tanks 
and flushometer tanks equipped for manual flushing 
shall be controlled by a float valve or other automatic 
device designed to refill the tank after each discharge 
and to completely shut off the water flow to the tank 
when the tank is filled to operational capacity. 
Provision shall be made to automatically supply water 
to the fixture so as to refill the trap seal after each 
flushing. The water supply to flush tanks equipped for 
automatic flushing shall be controlled by a suitable 
timing device. 

411.5 Flush Valves in Flush Tanks. Flush valve 
seats in tanks for flushing water closets shall be at 
least one (1) inch (25.4 mm) above the flood level 
rim of the bowl connected thereto, except in 
approved water closet and flush tank combinations 
designed so that when the tank is flushed and the 
fixture is clogged or partially clogged, the flush 
valve closes tightly so that water does not spill 
continuously over the rim of the bowl or backflow 
from the bowl to the tank. 

411.6 Overflows in Flush Tanks. Flush tanks shall 
be provided with overflows discharging into the 
water closet or urinal connected thereto. Overflows | 
supplied as original parts with the fixture shall be of 
sufficient size to prevent tank flooding at the 
maxinium rate at which the tank is supplied with 
water under normal operating conditions and when 
installed per manufacturer's instructions. 

412.0 Floor Drains and Shower Stalls. 

412.1 Floor drains shall be considered plumbing 
fixtures, and each such drain shall be provided with 
an approved, type strainer having a waterway 
equivalent to the area of the tailpiece. Floor drains, 
floor receptors, and shower drains shall be of an 
approved type, suitably flanged to provide a 
watertight joint in the floor. 

412.2 Location of Floor Drains. Floor drains shall 
be installed in the following areas: 

412.2.1 Toilet rooms containing two (2) or more 
water closets or a combination of one (1) water 
closet and one (1) urinal, except in a dwelling 



29 



412.2-412.8 



UNIFORM PLUMBING CODE 



unit. The floor shall slope toward the floor 
drains. 

41 2.2.2 Commercial Kitchens. 

412.2.3 Laundry rooms in commercial 
buildings and common laundry facilities in 
multi-family dwelling buildings. 

412.3 Food Storage Areas. If drains are provided 
in storerooms, walk-in freezers, walk-in coolers, 
refrigerated equipment, or other locations where food 
is stored, such drains shall have indirect waste piping. 
Separate waste pipes shall be run from each food 
storage area, each with an indirect connection to the 
building sanitary drainage system. Traps shall be 
provided if required under Section 801.2.2 of this code 
and shall be vented. 

Indirect drains may be located in freezers or other 
spaces where freezing temperatures are maintained, 
provided that traps, when supplied, are located where 
the seal will not freeze. Otherwise, the floor of the 
freezer shall be sloped to a floor drain located outside 
of the storage compartment. 

412.4 Floor Slope. Floors shall be sloped to floor 
drains where drainage occurs on a regular or frequent 

I basis, or as otherwise required by the Authority 
Having Jurisdiction. 

412.5 Shower receptors are plumbing fixtures and 
shall conform to the general requirements therefor 
contained in Section 401.0. Each such shower receptor 
shall be constructed of vitrified china or earthenware, 
ceramic tile, porcelain-enameled metal, or of such 

I other material as may be acceptable to the Authority 
Having Jurisdiction. No shower receptor shall be 
installed unless it conforms to acceptable standards as 
" referenced in Table 14-1 or until a specification or a 
prototype or both of such receptor has first been 
submitted to and approval obtained from the 
I Authority Having Jurisdiction. 

412.6 Each shower receptor shall be an approved 
type and be so constructed as to have a finished dam, 
curb, or threshold which is at least one (1) inch (25.4 mm) 
lower than the sides and back of such receptor. In no 
case shall any dam or threshold be less than two (2) 
inches (51 mm) or more than nine (9) inches (229 mm) 
in depth when measured from the top of the dam or 
threshold to the top of the drain. Each such receptor 
shall be provided with an integral nailing flange to be 
located where the receptor meets the vertical surface 
of the finished interior of the shower compartment. 
The flange shall be watertight and extend vertically a 
minimum of one (1) inch (25.4 mm) above the top of 
the sides of the receptor. The finished floor of the 
receptor shall slope uniformly from the sides toward 
the drain not less than one-quarter (1/4) inch per foot 
(20.9 mm/m), nor more than one-half (1/2) inch per 



foot (41.8 mm/m). Thresholds shall be of sufficient 
width to accommodate a minimum twenty-two (22) 
inch (559 mm) door. Shower doors shall open so as to 
maintain a minimum twenty-two (22) inch (559 mm) 
unobstructed opening for egress. 

Exception: Showers which are designed to 
comply with the accessibility standards listed in 
Table 14-1. 

41 2.7 All shower compartments, regardless of shape, 
shall have a minimum finished interior of one 
thousand twenty-four (1024) square inches (0.66 m^) 
and shall also be capable of encompassing a thirty (30) 
inch (750 mm) circle. The minimum required area and 
dimensions shall be measured at a height equal to the 
top of the threshold and at a point tangent to its 
center line. The minimum area and dimensions shall 
be maintained to a point seventy (70) inches (1778 
mm) above the shower drain outlet with no 
protrusions other than the fixture valve or valves, 
shower head, soap dishes, shelves, and safety grab 
bars or rails. Fold-down seats in accessible shower 
stalls shall be permitted to protrude into the thirty (30) 
inch (750 mm) circle. 

Exception: Showers which are designed to 
comply with the accessibility standards listed in 
Table 14-1. (See TIA on page vi) 

412.8 When the construction of on-site built-up 
shower receptors is permitted by the Authority 
Having Jurisdiction, one of the following means shall 
be employed: 

(1) Shower receptors built directly on the 
ground: 

Show^er receptors built directly on the ground 
shall be watertight and shall be constructed 
from approved type dense, nonabsorbent and 
non-corrosive materials. Each such receptor 
shall be adequately reinforced, shall be 
provided with an approved flanged floor 
drain designed to make a watertight joint in 
the floor, and shall have smooth, impervious, 
and durable surfaces. 

(2) Shower receptors built above ground: 

When shower receptors are built above 
ground, the sub-floor and rough side of 
walls to a height of not less than three (3) 
inches (76 mm) above the top of the finished 
dam or threshold shall be first lined with 
sheet plastic,* lead,* or copper* or shall be 
lined with other durable and watertight 
materials. 

All lining materials shall be pitched one- 
quarter (1/4) inch per foot (20.9 mm/m) to weep 
holes in the sub-drain of a smooth and solidly 



30 



PLUMBING FIXTURES AND FIXTURE FITTINGS 



412.8-413.3 



formed sub-base. All such lining materials shall 
extend upward on the rough jambs of the 
shower opening to a point no less than three (3) 
inches (76 nim) above the top of the finished 
dam or threshold and shall extend outward over 
the top of the rough threshold and be turned 
over and fastened on the outside face of both the 
rough threshold and the jambs. 

Non-metallic shower sub-pans or linings 
may be built up on the job site of not less than 
three (3) layers of standard, grade fifteen (15) 
pound (6.8 kg) asphalt impregnated roofing 
felt. The bottom layer shall be fitted to the 
formed sub-base and each succeeding layer 
thoroughly hot-mopped to that below. All 
corners shall be carefully fitted and shall be 
made strong and watertight by folding or 
lapping, and each corner shall be reinforced 
with suitable webbing hot-mopped in place. 
All folds, laps, and reinforcing webbing shall 
extend at least four (4) inches (102 mm) in all 
directions from the corner and all webbing 
shall be of approved type and mesh, producing a 
tensile strength of not less than fifty (50) psi 
(344.5 kPa) in either direction. Non-metallic 
shower sub-pans or linings may also consist of 
multi-layers of other approved equivalent 
materials suitably reinforced and carefully 
fitted in place on the job site as elsewhere 
required in this section. 

Linings shall be properly recessed and 
fastened to approved backing so as not to 
occupy the space required for the wall covering 
and shall not be nailed or perforated at any 
point which may be less than one (1) inch (25.4 
mm) above the finished dam or threshold. An 
approved type sub-drain shall be installed with 
every shower sub-pan or lining. Each such sub- 
drain shall be of the type that sets flush with the 
sub-base and shall be equipped with a clamping 
ring or other device to make a tight connection 
between the lining and the drain. The sub-drain 
shall have weep holes into the waste line. The 
weep holes located in the sub-drain clamping 
ring shall be protected from clogging. 

All shower lining materials shall conform to 
approved standards acceptable to the Authority 
Having Jurisdiction. 



*Lead and copper sub-pans or linings shall be 
insulated from all conducting substances other than 
their connecting drain by fifteen (15) pound (6.8 kg) 
asphalt felt or its equivalent and no lead pan or liner 



shall be constructed of material weighing less than 
four (4) pounds per square foot (19.5 kg/m^). Copper 
pans or liners shall be at least No. 24 B & S Gauge 
(0.02 inches) (0.5 mm). Joints in lead pans or liners 
shall be burned. Joints in copper pans or liners shall be 
soldered or brazed. Plastic pans shall not be coated 
with asphalt-based materials. 

412.8.1 Tests for Shower Receptors. Shower 
receptors shall be tested for watertightness by 
filling with water to the level of the rough 
threshold. The test plug shall be so placed that 
both upper and under sides of the sub-pan shall 
be subjected to the test at the point where it is 
clamped to the drain. 

412.9 Floors of public shower rooms shall have a 
non-skid surface and shall be drained in such a 
manner that waste water from one bather will not 
pass over areas occupied by other bathers. Gutters in 
public or gang shower rooms shall have rounded 
corners for easy cleaning and shall be sloped not less 
than two (2) percent toward drains. Drains in gutters 
shall be spaced not more than eight (8) feet (2438 
mm) from side walls nor more than sixteen (16) feet 
(4879 mm) apart. 

412.10 DELETED. 

412.11 Location of Valves and Heads. Control 
valves and shower heads shall be located on the 
sidewall of shower compartments or be otherwise 
arranged so that the shower head does not discharge 
directly at the entrance to the compartment and the 
bather can adjust the valves prior to stepping into the 
shower spray. 

412.12 Water Supply Riser. Every water supply 
riser from the shower valve to the shower head outlet, 
whether exposed or not, shall be securely attached to 
the structure. 

413.0 Minimum Number of Required Fixtures. 

413.1 Fixture Count. Plumbing fixtures shall be 
provided for the type of building occupancy and 
in the minimum number shown in Table 4-1. 

413.2 Access to Fixtures. 

413.2.1 In multi-story buildings, accessibility to 
the required fixtures shall not exceed one (1) 
vertical story. 

413.2.2 Fixtures accessible only to private 
offices shall not be counted to determine 
compliance with this section. 

413.3 Separate Facilities. 

Separate toilet facilities shall be provided for each sex. 
Exceptions: 
(1) Residential installations. 



31 



413.3-419.0 



UNIFORM PLUMBING CODE 



(2) In occupancies serving ten (10) or fewer 
people, one (1) toilet facility, designed for 
use by no more than one (1) person at a 
time, shall be permitted for use by both 
sexes. 

(3) In business and mercantile occupancies with 
a total floor area of fifteen hundred (1500) 
square feet (139.5 m^) or less, one (1) 
toilet facility, designed for use by no more 
than one (1) person at a time, shall satisfy 
the requirements for serving customers and 
employees of both sexes. 

413.4 Fixture Requirements for Special 
Occupancies. 

413.4.1 Additional fixtures may be required 
when unusual environmental conditions or 
special activities are encountered. 

413.4.2 In food preparation areas, fixture 
requirements may be dictated by health codes. 

41 3.4.3 Types of occupancy not shown in Table 
4-1 shall be considered individually by the 

I Authority Having Jurisdiction. 

413.5 Facilities in Mercantile and Business 
Occupancies Serving Customers. 

413.5.1 Requirements for customers and 
employees shall be permitted to be met with a 
single set of restrooms accessible to both groups. 
The required number of fixtures shall be the 
greater of the required number for employees or 
the required number for customers. 

413.5.2 Fixtures for customer use shall be 
permitted to be met by providing a centrally 
located facility accessible to several stores. The 
maximum distance from entry to any store to 
this facility shall not exceed five hundred (500) 
feet (152.4 m). 

413.5.3 In stores with a floor area of one 
hundred fifty (150) square feet (13.9 m^) or 
less, the requirenient to provide facilities for 
employees shall be permitted to be met by 
providing a centrally located facility accessible 
to several stores. The maximum distance from 
entry to any store to this facility shall not 
exceed three hundred (300) feet (91.4 m). 

413.6 Food Service Establishments. Food service 
establishments with an occupant load of one hundred 
(100) or more shall be provided with separate facilities 
for employees and customers. Customer and 
employee facilities may be combined for occupant 
loads less than one hundred (100). 

413.7 Toilet Facilities for Workers. 

Suitable toilet facilities shall be provided and 
maintained in a sanitary condition for the use of 
workers during construction. 



414.0 Fixtures and Fixture Fittings for Persons 
with Disabilities. 

Plumbing fixtures and fixture fittings for persons with 
disabilities shall conform to the appropriate standards 
referenced in Table 14-1 of this code. 

414.1 Limitation of Hot Water Temperature for 
Public Lavatories. 

Hot water delivered from public-use lavatories shall 
be limited to a maximum temperature of 120°F. The 
water heater thermostat shall not be considered a 
control for meeting this provision. 

415.0 Whirlpool Bathtubs. 

Unless otherwise listed, all whirlpool bathtubs shall 
comply with the following requirements: 

415.1 A removable panel of sufficient dimension 
shall be provided to access the pump. 

415.2 The circulation pump shall be located above 
the crown weir of the trap. 

41 5.3 The pump and the circulation piping shall be 
self-draining to minimize water retention in 
accordance with standards referenced in Table 14-1. 

415.4 Suction fittings on whirlpool bathtubs shall 
comply with the listed standards. 

416.0 Installation of Fixture Fittings. 

Where two separate handles control the hot and cold 
water, the left-hand control of the faucet when facing 
the fixture fitting outlet shall provide the means to 
alter the hot water temperature from the fixture fitting. 

Single-handle mixing valves shall have the flow of 
hot water correspond to the markings on the fitting. 

417.0 Bidets. 

417.1 Materials. Bidets shall conform to the 
standards listed in Table 14-1. 

417.2 Backflow Protection. The water supply to 
the bidet shall be protected according to Chapter 6, 
which allows for an airgap or vacuum breaker. 

418.0 DELETED. 

419.0 Future Fixtures. 

When provision is made for the future installation of 
fixtures, those provided for shall be considered in 
determining the required sizes of drain pipes. 
Construction for future installations shall be 
terminated with a plugged fitting or fittings. Where 
the plugged fitting is at the point where the trap of a 
fixture may be installed, the plumbing system for such 
fixture shall be complete and conform with all 
plumbing requirements of this code. 



32 



PLUMBING FIXTURES AND FIXTURE FITTINGS 



420.0- Table 4-1 



420.0 Shower and Tub-Shower Combination 
Control Valves. 

Showers and tub-shower combinatioris in all buildings 
shall be provided with individual control valves of the 
pressure balance, thermostatic, or combination 
pressure balance /thermostatic mixing valve type that 
provide scald and thermal shock protection. These 
valves shall conform to ASSE 1016. Gang showers, 
when supplied with a single temperature-controlled 
water supply pipe, may be controlled by a master 
thermostatic mixing valve in lieu of individually 
controlled pressure balance, thermostatic, or 



combination pressure balance /thermostatic niixing 
valves. Handle position stops shall be provided on 
such valves and shall be adjusted per the 
manufacturer's instructions to deliver a maximum 
mixed water setting of 120°F (49°C). The water heater 
thermostat shall not be considered a suitable control 
for meeting this provision. 

421.0 Limitation of Hot Water in Bathtubs. The 

maximum hot water temperature discharging from 
the bathtub filler shall be 120°F. 



TABLE 4-1 
Minimum Plumbing Facilities^ 

I Each building shall be provided with sanitary facilities, including provisions for the physically handicapped as prescribed by the Department Having Jurisdiction. 
For requirements for the handicapped, ICC/ANSI All 7.1, Accessible and Usable Buildings and Facilities, maybe used. 

The total occupant load shall be determined by minimum exiting requirements. The minimum number of fixtures shall be calculated at fifty (50) percent male and 
fifty (50) percent female based on the total occupant load. 



Type of Building 


Water Closets" 


Urinals"" 


Lavatories 


Bathtubs or Showers 


Drinking Fountains'^" 


or Occupancy^ 


(Fixtures per Person) 


(Fixtures per Person) 


(Fixtures per Person) 


(Fixtures per Person) 


(Fixtures per Person) 


Assembly places - 


Male Female 


Male 


Male Female 






heatres, auditoriums. 


1:1-15 1:1-15 


0:1-9 


1 per 40 1 per 40 






convention halls, etc- 


2: 16-35 3: 16-35 


1:10-50 








for permanent 


3: 36-55 4: 36-55 


Add one fixture 








employee use 


Over 55, add 1 fixture 
for each additional 40 
persons. 


for each 
additional 50 males. 








Assembly places - 


Male Female 


Male 


Male Female 






theatres. Auditoriums, 


1:1-100 3:1-50 


1:1-100 


1:1-200 1:1-200 




1:1-150 


Convention Halls, etc. - 


2:101-200 4:51-100 


2: 101-200 


2:201-400 2:201-400 




2:151-400 


tor public use 


3:201-400 8:101-200 


3:201-400 


3:401-750 3:401-750 




3:401-750 




11:201-400 


4:401-600 


Over 750, add one fixture 




Over 750, add one fixture 




Over 400, add one fixture 


Over 600 add 1 fixture 


for each additional 500 




for each additional 500 




for each additional 500 


for each additional 


persons. 




persons. 




males and 1 for each 


300 males. 










additional 125 females. 










Dormitories'— 


Male Female 


Male 


Male Female 


1 per 8 


1 per 150'= 


School or Labor 


1 per 10 1 per 8 


1 per 25 


1 per 12 1 per 12 


For females, add 






Add 1 fixture for each 


Over 150, add 1 fixture 


Over 12 add one fixture for 


1 bathtub per 30. 






additional 25 males (over 


for each additional 50 


each additional 20 males 


Over 150, add 1 






10) and 1 for each additional 


males. 


and 1 for each 15 


per 20. 






20 females (over 8). 




additional females. 






Dormitories - 


Male Female 


Male 


Male Female 


1 per 8 




for staff use 


1:1-15 1:1-15 
2:16-35 3:16-35 
3: 36-55 4: 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


1 per 50 


1 per 40 1 per 40 






Dwellings" 












Single dwelling 


1 per dwelling 




1 per dwelling 


1 per dwelling 




Multiple dwelling or 


1 per dwelling or 




1 per dwelling or 


1 per dwelling or 




apartment house 


apartment unit 




apartment unit 


apartment unit 




Hospital waiting rooms 


1 per room 




1 per room 




1 per 150" 


Hospitals - 


Male Female 


Male 


Male Female 






for employee use 


1:1-15 1:1-15 
2: 16-35 3: 16-35 
3: 36-55 4: 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


0:1-9 

1:10-50 

Add one fixture for each 

additional 50 males. 


1 per 40 1 per 40 







33 



Table 4-1 continued 



UNIFORM PLUMBING CODE 



Type of Building 


Water Closets'" 


Urinals' '° 


Lavatories 


Bathtubs or Showers 


Drinking Fountains*" 


or Occupancy^ 


(Fixtures per Person) 


(Fixtures per Person) 


(Rxtures per Person) 


(Rxtures per Person) 


(Fixtures per Person) 


Hospitals 












Individual room 


1 per room 




1 per room 


1 per room 




word room 


1 per 8 patients 




1 per 1 patients 


1 per 20 patients 


1 per156'' 


Industrial^ warehouses 


Male Female 




Up to 100, 1 per 10 


1 shower for 


1 per 1 50'' 


workshops, foundries. 


1:1-10 1:1-10 




persons 


each 15 persons 




and similar 


2:11-25 2:11-25 






exposed to 




establishments - 


3: 26-50 3: 26-50 




Over 100, 1 per 15 


excessive heat or 




for employee use 


4:51-75 4:51-75 
5:76-100 5:76-100 
Over 100, add 1 fixture for 
each additional 30 persons 




persons'" 


to skin contam- 
ination with poison- 
ous, infectious, or 
irritating material 




Institutional - other than 


Male Female 


Male 


Male Female 


1 per 8 


1 per 150'" 


hospitals or penal 


1 per 25 1 per 20 


0:1-9 


1 per 10 1 per 10 






institutions (on each 




1:10-50 








occupied floor) 




Add one fixture for each 
additional 50 males. 








Institutional - other than 


Male Female 


Male 


Male Female 


1 per 8 


1 per 150'" 


hospitals or penal 


1:1-15 1:1-15 


0:1-9 


1 per 40 1 per 40 






institutions (on each 


2: 16-35 3: 16-35 


1:10-50 








occupied floor) - 


3: 36-55 4: 36-55 


Add one fixture for each 








for employee use 


Over 55, add 1 fixture for 
each additional 40 persons. 


additional 50 males. 








Office or public 


Male Female 


Male 


Male Female 




1 per 1 50'" 


buildings 


1:1-100 3:1-50 


1:1-100 


1:1-200 1:1-200 








2:101-200 4:51-100 


2: 101-200 


2:201-400 2:201-400 








3:201-400 8:101-200 


3:201-400 


3:401-750 3:401-750 








11:201-400 


4:401-600 


Over 750, add one fixture 








Over 400, add one fixture 


Over 600, add 1 fixture for 


for each additional 500 








for each additional 500 


each additional 300 males. 


persons. 








males and 1 for each 












additional 150 females. 










Office or public 


Male Female 


Male 


Male Female 






buildings - 


1:1-15 1:1-15 


0:1-9 


1 per 40 1 per 40 






for employee use 


2:16-35 3:16-35 
3: 36-55 4: 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


1:10-50 

Add one fixture for each 

additional 50 males. 








Penal institutions - 


Male Female 


Male 


Male Female 




1 per 150'" 


for employee use 


1:1-15 1:1-15 
2:16-35 3:16-35 
3: 36-55 4: 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


0:1-9 

1:10-50 

Add one fixture for each 

additional 50 males. 


1 per 40 1 per 40 






Penal institutions - 












for prison use 












Cell 


1 per cell 


Male 


1 per cell 




1 per cell block floo 


Exercise room 


1 per exercise room 


1 per exercise room 


1 per exercise room 




1 per exercise room 


Restaurants, pubs, and 


Male Female 


Male 


Male Female 






Lounges" 


1:1-50 1:1-50 


1: 1-150 


1:1-150 1:1-150 








2:51-150 2:51-150 


Over 1 50, add 1 fixture for 


2:151-200 2:151-200 








3:151-300 4:151-300 


each additional 150 males. 


3:201-400 3:201-400 








Over 300, add 1 fixture for 




Over 400, add 1 fixture for 








each additional 200 persons 




each additional 400 persons. 






Schools - for staff use 


Male Female 


Male 


Male Female 






All schools 


1:1-15 1:1-15 
2: 16-35 2: 16-35 
3: 36-55 3; 36-55 
Over 55, add 1 fixture for 
each additional 40 persons. 


1 per 50 


1 per 40 1 per 40 






Schools - for student use 


Male Female 




Male Female 




1 per 1 50'" 


Nursery 


1:1-20 1:1-20 
2:21-50 2:21-50 
Over 50, add 1 fixture for 
each additional 50 persons 




1:1-25 1:1-25 
2: 26-50 2: 26-50 
Over 50, add 1 fixture for 
each additional 50 persons 






Elementary 


Male Female 


Male 


Male Female 




1 per 1 50'" 




1 per 30 1 per 25 


1 per 75 


1 per 35 1 per 35 






Secondary 


Male Female 


Male 


Male Female 




1 per 150'" 




1 per 40 1 per 30 


1 per 35 


1 per 40 1 per 40 







34 



PLUMBING FIXTURES AND FIXTURE FITTINGS 



Table 4-1 continued 



Type of Building 
or Occupancy' 


Water Closets" 
(Fixtures per Person) 


Urinals''" 
(Rxtures per Person) 


Lavatories 
(Rxtures per Person) 


Bathtubs or Showers 
(Rxtures per Person) 


Drinking Fountains^" 
(Rxtures per Person) 


Others (colleges, 
universities, adult 
centers, etc.) 


Male Female 
1 per 40 1 per 30 


Male 
1 per 35 


Male Female 
1 per 40 1 per 40 




1 per 1 50'" 


Worship places 
Educational and 
Activities Unit 


Male Female 
1 per 150 1 per 75 


Male 
1 per 150 


1 per 2 water closets 




1 per 150'^ 


Worship places principal 
assembly place 


Male Female 
1 per 150 1 per 75 


Male 
1 per 150 


1 per 2 water closets 




1 per 1 50'" 



The figures shown are based upon one (1) fixture being the minimum required for the number of persons indicated or any fraction thereof. 

Building categories not shown on this table shall be considered separately by the Authority Having Jurisdiction. 

Drinking fountains shall not be installed in toilet rooms. 

Laundry trays. One (1) laundry tray or one (1) automatic washer standpipe for each dwelling unit or one (1) laundry tray or one (1) automatic 
washer standpipe, or combination thereof, for each twelve (12) apartments. Kitchen sinks, one (1) for each dwelling or apartment unit. 

For each urinal added in excess of the minimum required, one water closet may be deducted. The number of water closets shall not be 
reduced to less than two-thirds (2/3) of the minimum requirement. 

As required by ANSI Z4.1-1968, Sanitation in Places of Employment. 

Where there is exposure to skin contamination with poisonous, infectious, or irritating materials, provide one (1) lavatory for each five (5) 
persons. 

Twenty-four (24) lineal inches (610 mm) of wash sink or eighteen (18) inches (457 mm) of a circular basin, when provided with water outlets for 
such space, shall be considered equivalent to one (1 ) lavatory. 

Laundry trays, one (1) for each fifty (50) persons. Service sinks, one (1) for each hundred (100) persons. 

General. In applying this schedule of facilities, consideration shall be given to the accessibility of the fixtures. Conformity purely on a numerical 
basis may not result in an installation suited to the needs of the individual establishment. For example, schools should be provided with toilet 
facilities on each floor having classrooms. 

a. Surrounding materials, wall, and floor space to a point two (2) feet (610 mm) in front of urinal lip and four (4) feet (1219 mm) above the 
floor, and at least two (2) feet (610 mm) to each side of the urinal shall be lined with non-absorbent materials. 

b. Trough urinals shall be prohibited. 

A restaurant is defined as a business which sells food to be consumed on the premises. 

a. The number of occupants for a drive-in restaurant shall be considered as equal to the number of parking stalls. 

b. Employee toilet facilities shall not be included in the above restaurant requirements. Hand-washing facilities shall be available in the 
kitchen for employees. 

Where food is consumed indoors, water stations may be substituted for drinking fountains. Offices, or public buildings for use by more than six 
(6) persons shall have one (1) drinking fountain for the first one hundred fifty (150) persons and one (1) additional fountain for each three 
hundred (300) persons thereafter. 

There shall be a minimum of one (1) drinking fountain per occupied floor in schools, theatres, auditoriums, dormitories, offices, or public 
buildings. 

The total number of water closets for females shall be at least equal to the total number of water closets and urinals required for males. 



35 



UNIFORM PLUMBING CODE 



36 



CHAPTER 5 

WATER HEATERS 



Parti 



501.0 General. 

The regulations of this chapter shall govern the 
construction, location, and installation of fuel-burning 
and other water heaters heating potable water, together 
with all chimneys, vents, and their connectors. The 
minimum capacity for water heaters shall be in 
accordance with the first hour rating listed in Table 5-1. 
All design, construction, and workmanship shall be in 
conformity with accepted engineering practices, 
manufacturer's installation instructioris, and applicable 
standards and shall be of such character as to secure the 
results sought to be obtained by this code. No water 
heater shall be hereinafter installed which does not 
comply in all respects with the type and model of each 
size thereof approved by the Authority Having 
Jurisdiction. A list of accepted gas equipment standards 
is included in Table 14-1. 

502.0 Definitions. 

502.1 Appliance Categorized Vent Diameter/Area. 

The minimum vent area /diameter permissible for 
Category I appliances to maintain a nonpositive vent 
static pressure when tested in accordance with 
nationally recognized standards, [extracted from 
NFPA 54] 

502.2 Chimney. (See also Gas Vent, and Venting 
System.) One or more passageways, vertical or 
nearly so, for conveying flue or vent gases to the 
outside atmosphere, [extracted from NFPA 54] 

502.3 Chimney, Factory-Built. A chimney composed 
of listed factory-built components assembled in 
accordance with the terms of listing to form the 
completed chimney, [extracted from NFPA 54] 

502.4 Chimney, Masonry. A field-constructed 
chimney of solid masonry units, bricks, stones, listed 
masonry chimney units, or reinforced portland 
cement concrete, lined with suitable chimney flue 
liners, [extracted from NFPA 54] 



502.5 Chimney, Metal. A field-constructed chimney 
of metal, [extracted from NFPA 54] 

502.6 Combustible Material. As pertaining to 
materials adjacent to or in contact with heat-producing 
appliances, vent connectors, gas vents, chimneys, 
steam and hot water pipes, and warm air ducts, shall 
mean materials made of or surfaced with wood, 
compressed paper, plant fibers, or other materials that 
are capable of being ignited and burned. Such material 
shall be considered combustible even though flame- 
proofed, fire-retardant treated, or plastered, [extracted 
from NFPA 54] 

502.7 Direct- Vent Appliance. Appliances that are 
constructed and installed so that all air for 
combustion is derived directly from the outside 
atmosphere and all flue gases are discharged to the 
outside atmosphere. 

502.8 Flue Collar. That portion of an appliance 
designed for the attachment of a draft hood, vent 
connector, or venting system, [extracted from NFPA 54] 

502.9 Gas Vent, Type B. A vent for venting listed 
gas appliances with draft hoods and other Category I 
gas appliances listed for use with Type B gas vents. 

502.10 Gas Vent, Type L. A vent for venting 
appliances listed for use with Type L vents and 
appliances listed for use with Type B gas vents. 

502.11 Vent. A passageway used to convey flue 
gases from gas utilization equipment or their vent 
connectors to the outside atmosphere, [extracted 
from NFPA 54] 

502.12 Vent Connector. The pipe or duct that 
connects a fuel-gas-burning appliance to a vent or 
chimney, [extracted from NFPA 54] 

502.13 Venting System. A continuous open 
passageway from the flue collar or draft hood of a 
gas-burning appliance to the outside atmosphere for 
the purpose of removing flue or vent gases, 
[extracted from NFPA 54] 







TABLE 5-V FIRST HOUR RATING 










Number of Bathrooms 


1 to 1 .5 


2 to 2.5 


3 to 3.5 


Number of Bedrooms 


1 


2 


3 


2 


3 


4 


5 


3 


4 


5 


6 


First Hour Rating,^ Gallons 


42 


54 


54 


54 


67 


67 


80 


67 


80 


80 


80 



Note: 

1 The first hour rating is found on the "Energy Guide" lable. 

2 Non-storage and solar water heaters shall be sized to meet the appropriate first hour rating as shown in the table. 



37 



502.14-507.1 



UNIFORM PLUMBING CODE 



502.14 Water Heater. An appliance for supplying 
hot water for domestic or commercial purposes, 
[extracted from NFPA 54] 

503.0 Permits. 

It shall be unlawful for any person to install, remove, or 
replace or cause to be installed, removed, or replaced 
any water heater without first obtaining a permit from 
I the Authority Having Jurisdiction to do so. 

504.0 Inspection. 

504.1 Inspection of Chimneys or Vents. This 
inspection shall be made after all chimneys, vents, or 
parts thereof, authorized by the permit, have been 
installed and before any such vent or part thereof has 
been covered or concealed. 

504.2 Final Water Heater Inspection. This 
inspection shall be made after all work authorized by 

I the permit has been installed. The Authority Having 
Jurisdiction will make such inspection as deemed 
necessary to be assured that the work has been 
installed in accordance with the intent of this code. 
No equipment or part thereof shall be covered or 
concealed until the same has been inspected and 
I approved by the Authority Having Jurisdiction. 

505.0 Water Heater Requirements. 

505.1 Location. 

Water heater installations in bedrooms and 
bathrooms shall be of the direct-vent type. [NFPA 
54:9.28.1.1] 

505.2 Water heaters of other than the direct-vent 
type shall be located as close as practical to the 
chimney or gas vent. [NFPA 54:9.28.1.2] 

505.3 Clearance. 

505.3.1 The clearances shall not be such as to 
interfere with combustion air, draft hood clearance 
and relief, and accessibility for servicing. Listed 
water heaters shall be installed in accordance with 
their listing and the manufacturers' instructions. 

505.3.2 Unlisted water heaters shall be installed 
with a clearance of 12 in. (300 mm) on all sides 
and rear. Combustible floors under unlisted 
water heaters shall be protected in an approved 
manner. [NFPA 54:9.28.2.2] 

505.4 Pressure-Limiting Devices. A water heater 
installation shall be provided with overpressure 
protection by means of an approved listed device, and 
installed in accordance with the terms of its listing 
and the manufacturer's instructions. [NFPA 54: 9.28.3] 

505.5 Temperature-Limiting Devices. Water heater 
installation or a hot water storage vessel installation 



shall be provided with overtemperature protection 
by means of an approved listed device installed in 
accordance with the terms of its listing and the 
manufacturers' instructions. [NFPA 54: 9.28.4] 

505.6 Temperature, Pressure, and Vacuum Relief 
Devices. The installation of temperature, pressure, 
and vacuum relief devices or combinations thereof, 
and automatic gas shutoff devices, shall be in 
accordance with the terms of their listing and the 
manufacturers' instructions. A shutoff valve shall not 
be placed between the relief valve and the water 
heater or on discharge pipes between such valves 
and the atmosphere. The hourly Btu discharge 
capacity or the rated steam relief capacity of the 
device shall not be less than the input rating of the 
water heater. [NFPA 54: 9.28.5] 

506.0 Oil-Burning and Other Water Heaters. 

506.1 Water heaters deriving heat from fuels or types 
of energy other than gas shall be constructed and 
installed in accordance with approved standards in a 
manner satisfactory to the Authority Having I 
Jurisdiction. Vents or chimneys for such appliances I 
shall be approved types and shall be made for an 
adequate supply of air for combustion and for 
adequate ventilation of heater rooms or compartments. 
Each such appliance shall be installed in an 
approved location satisfactory to the Authority 
Having Jurisdiction and to local and state fire- 
prevention agencies. 

506.2 All storage-type water heaters and hot water 
boilers deriving heat from fuels or types of energy 
other than gas, shall be provided with, in addition to 
the primary temperature controls, an overtemperature 
safety protection device constructed, listed, and 
installed in accordance with nationally recognized 
applicable standards for such devices and a 
combination temperature and pressure relief valve. 

506.3 Oil-fired water heaters shall be installed in 
accordance with NFPA 31, Standard for the Installation 
of Oil-Burning Equipment. 

507.0 Air for Combustion and Ventilation. 

507.1 General. 

507.1.1 Air for combustion, ventilation, and 
dilution of flue gases for gas utilization 
equipment installed in buildings shall be 
obtained by application of one of the methods 
covered in 507.2.1-507.7. Gas utilization 
equipment of other than natural draft and 
Category I vented appliances shall be provided 
with combustion, ventilation, and dilution air in 
accordance with the equipment manufacturer's 



38 



WATER HEATERS 



507.1 -507.4 



instructions. Where infiltration does not provide 
the necessary air, outdoor air shall be introduced in 
accordance with methods covered in 507.4 - 507.7. 

Exception No. 1: This provision shall not 
apply to direct-vent appliances. 

Exception No. 2: Type 1 clothes dryers that 
are provided with makeup air in accordance 
with section NFPA 54:9.4.3. 

(The following references were extracted from NFPA 54.) 

3.3.43 Clothes Dryer. A device used to dry wet 
laundry by means of heat derived from the 
combustion of fuel gases. 

3.3.44 Clothes Dryer, Type 1. Factory-built package, 
multiply produced. Primarily used in the family 
living environment. May or may not be coin-operated 
for public use. 

9.4.2 Exhausting to Outdoors. Type 1 and Type 2 
clothes dryers shall be exhausted to the outside air. 

9.4.3 Provisions for Make-Up Air. 

9.4.3.1 Make-up air shall be provided for Type 1 
clothes dryers in accordance with the manufacturers' 
installation instructions. 

507.1.2 Gas appliances of other than natural 
draft design and other than Category I vented 
appliances shall be provided with combustion, 
ventilation, and dilution air in accordance with 
the appliance manufacturer's instructions. 

507.1 .3 Where used, a draft hood or a barometric 
draft regulator shall be installed in the same 
room or enclosure as the equipment served so as 
to prevent any difference in pressure between the 
hood or regulator and the combustion air supply. 

507.1.4 Makeup air requirements for the 
operation of exhaust fans, kitchen ventilation 
systems, clothes dryers, and fireplaces shall be 
considered in determining the adequacy of a 
space to provide combustion air requirements. 
[NFPA 54:8.3.1.5] 

Table 5-2 DELETED. 

507.2 Indoor Combustion Air. The required 
volume of indoor air shall be determined in 
accordance with method 507.2.1 or 507.2.2 except 
that where the air infiltration rate is known to be less 
than 0.40 ACH, method 507.2.2 shall be used. The 
total required volume shall be the sum of the 
required volume calculated for all appliances located 
within the space. Rooms communicating directly 
with the space in which the appliances are installed 
through openings not furnished with doors and 
through combustion air openings sized and located 
in accordance with 507.3 are considered a part of the 
required volume. 



507.2.1 Standard Method: The minimum 
required volume shall be 50 cubic feet per 1000 
Btu /hour (4.8 mVkW). 

507.2.2 Known Air Infiltration Rate Method: 

Where the air infiltration rate of a structure is 
known, the minimum required volume shall be 
determined as follows: 

For appliances having other than fan-assisted 
combustion systems: Calculate using Equation 
5-1 but no smaller than 35 cubic feet per 1000 
Btu /hour (3.4 mVkW). 

For fan-assisted combustion system appliances: 
Calculate using Equation 5-2 but no smaller 
than 25 cubic feet per 1000 Btu/hour (2.4 mVkW). 

[NFPA 54:8.3.2.2] 

Equation 5-1: 

Required Volume o^;jg^ > (21ff /ACH)x ( I^^^^^ / 1,000 Btu /h) 
Equation 5-2: 

Required Volume yg„ > (15fe/ACH)x ( Iy„„/ 1,000 Btu/ h) 

Where: 

^other ^ ^^^ Appliances other than Fan-Assisted 
Input in Btu per hour 

^fan ~ Fan- Assisted Appliance Input in Btu/hour 
ACH = Air Change per Hour (Percent of volume of 

space exchanged per hour, expressed as a 

decimal) 

507.3 Indoor Opening Size and Location. 

Openings used to connect indoor spaces shall be 
sized and located in accordance with the following. 

(1) Combining spaces on the same story. Each 
opening shall have a minimum free area of 1 
in. V 1000 Btu/h (220 mmVkW) of the total 
input rating of all gas utilization equipment 
in the space, but not less than 100 in.^ 
(0.06 m^). One opening shall commence 
within 12 in. (300 mm) of the top, and one 
opening shall commence within 12 in. 
(300 mm) of the bottom, of the enclosure 
[see Figure 5-12]. The minimum dimension of 
air openings shall be not less than 3 in. (80 mm). 

(2) Combining spaces in different stories. The 
volumes of spaces in different stories shall be 
considered as communicating spaces where 
such spaces are connected by one or more 
openings in doors or floors having a total 
minimum free area of 2 in. V 1000 Btu/h of 
total input rating of all gas utilization 
equipment. [NFPA 54:8.3.2.3(2)] 

507.4 Outdoor Combustion Air. Outdoor 
conibustion air shall be provided through openings to 



39 



507.4 - 507.9 



UNIFORM PLUMBING CODE 



the outdoors in accordance with methods 507.4.1 or 
507.4.2. The minimum dimension of air openings shall 
not be less than 3 in. (80 nim). 

507.4.1 Two Permanent Openings Method: 

Two permanent openings, one commencing 
within 12 in. (300 mm) of the top and one 
commencing within 12 in. (300 mm) of the 
bottom of the enclosure shall be provided. The 
openings shall communicate directly, or by 
ducts, with the outdoors or spaces that freely 
communicate with the outdoors. [See Figure 5-8.] 

(1) Where directly communicating with the 
outdoors or where communicating to the 
outdoors through vertical ducts, each 
opening shall have a minimum free area of 1 
in. V 4000 Btu/h (550 mmVkW) of total input 
rating of all equipment in the enclosure. [See 
Figures 5-9 and 5-10.] 

(2) Where communicating with the outdoors 
through horizontal ducts, each opening shall 
have a minimum free area of 1 in. V 2000 
Btu/h (1100 mmVkW) of total input rating 
of all equipment in the enclosure. [See 
Figure 5-11] 

507.4.2 One Permanent Opening Metliod: (2) 

One permanent opening, commencing within 12 
in. (300 mm) of the top of the enclosure, shall be 
provided. The equipment shall have clearances of 
at least 1 in. (25 mm) from the sides and back and 
6 in. (160 mm) from the front of the appliance. 
The opening shall directly commurucate with the 
outdoors or shall communicate through a vertical 
or horizontal duct to the outdoors or spaces that 
freely com^municate with the outdoors [see 
Figure 5-12] and shaU have a minimum free area of: 

(1) 1 in.V3000 Btu/h (700 mmVkW) of the 
total input rating of all equipment located in 
the enclosure, and 

(2) Not less than the sum of the areas of all vent 
cormectors in the space. [NFPA 54: 8.3.3.2] 

507.5 Combination Indoor and Outdoor 
Combustion Air. The use of a combination of indoor 
and outdoor combustion air shall be in accordance 
with 1 through 3 [see example calculation in NFPA 54 
Annex J and this chapter - Part II]. 

507.5.1 Indoor Openings. Where used, 
openings connecting the interior spaces shall 
comply with Section 507.3. 

507.5.2 Outdoor openings shall be located in 
accordance with Section 507.4.1 and 507.4.2. 

507.5.3 Outdoor Openings Size. The outdoor 
openings size shall be calculated in accordance 
with the following: 



(1) The ratio of interior spaces shall be the 
available volume of all communicating spaces 
divided by the required volume. 

(2) The outdoor size reduction factor shall be 1 
minus the ratio of interior spaces. 

(3) The minimum size of outdoor openings 
shall be the full size of outdoor openings 
calculated in accordance with Section 507.4.1 
or 507.4.2, multiplied by the reduction 
factor. The minimum dimension of air 
openings shall not be less than 3 in. (80 mm). 
[NFPA54:8.3.4(3)(c)] 

507.6 Engineered Installations. Engineered 
combustion air installations shall provide adequate 
supply of combustion, ventilation, and dilution air 
and shall be approved by the Authority Having 
Jurisdiction. [NFPA 54: 8.3.5] 

507.7 Mechanical Combustion Air Supply. Where 
all combustion air is provided by a mechanical air 
supply system, the combustion air shall be supplied 
from outdoors at the minimum rate of 0.35 feet^/min 
per 1,000 Btu/h (0.034 mVmin per kW for all 
appliances located within the space. 

507.7.1 Where exhaust fans are installed, 
additional air shall be provided to replace the 
exhausted air. 

507.7.2 Each of the appliances served shall be 
interlocked to the mechanical air supply 
system to prevent main burner operation 
where the mechanical air supply system is not 
in operation. 

507.7.3 Where combustion air is provided by 
the building's mechanical ventilation system, the 
system shall provide the specified cottibustion 
air rate in addition to the required ventilation 
air. [NFPA 54: 8.3.6.3] 

507.8 RESERVED 

507.9 Louvers and Grilles. (See TIA on page vii) 

(A) The required size of openings for combustion, 
ventilation, and dilution air shall be based 
on the net free area of each opening. Where the 
free area through a design of louver or grille 
is known, it shall be used in calculating the 
size opening required to provide the free 
area specified. Where the design and free 
area are not known, it shall be assumed that 
wood louvers will have 25 percent free area 
and metal louvers and grilles will have 75 
percent free area. Non-motorized louvers 
and grilles shall be fixed in the open 
position. 

(B) Motorized louvers shall be interlocked with 
the equipment so they are proven in the full 
open position prior to main burner ignition 



40 



WATER HEATERS 



507.9 - 508.6 



and during main burner operation. Means 
shall be provided to prevent the main burner 
from igniting should the louver fail to open 
during burner startup and to shut down the 
main burner if the louvers close during 
burner operation. [NFPA 54: 8.3.7.2] 

507.10 Combustion Air Ducts. Combustion air 
ducts shall comply with the following: 

(1) Ducts shall be of galvanized steel or an 
equivalent corrosion-resistant material. 

Exception: Within dwelling units, 
unobstructed stud and joist spaces shall not 
be prohibited from conveying combustion 
air, provided that not more than one 
fireblock is removed. 

(2) Ducts shall terminate in an unobstructed 
space, allowing free movement of combustion 
air to the appliances. 

(3) Ducts shall serve a single space. 

(4) Ducts shall not service both upper and 
lower combustion air openings where both 
such openings are used. The separation 
between ducts serving upper and lower 
combustion air openings shall be 
maintained to the source of combustion air. 

(5) Ducts shall not be screened where 
terminating in an attic space. 

(6) Intakes for combustion air ducts located 
exterior to the building shall have the lowest 
side of the combustion air intake openings 
located at least 12 inches vertically from the 
adjoining grade level. 

(7) Horizontal upper combustion air ducts shall 
not slope downward toward the source of 
combustion air. 

(8) The remaining space surrounding a 
chimney liner, gas vent, special gas vent, or 
plastic piping installed within a masonry 
chimney flue, metal or factory-built 
chimney, shall not be used to supply 
combustion air, unless it is listed and shown 
in the manufacturer's installation instructions. 
[NFPA 54: 8.3.8] 

508.0 Other Water l-leater Installation Requirements. 

I 508.1 The Authority Having Jurisdiction may require 
the use of an approved dielectric insulator on the 
water piping connections of water heaters and related 
water heating equipment. 

I 508.2 In seismic design categories C, D, E, and F, 
water heaters shall be anchored or strapped to resist 
horizontal displacement due to earthquake motion. 
Strapping shall be at points within the upper one- 



third (1/3) and lower one-third (1/3) of its vertical 
dimensions. At the lower point, a minimum distance 
of four (4) inches (102 mm) shall be maintained 
above the controls with the strapping. 

508.3 A water heater supported from the ground 
shall rest on level concrete or other approved base 
extending not less than three (3) inches (76 mm) 
above the adjoining ground level. 

508.4 When a water heater is located in an attic, 
attic-ceiling assembly, floor-ceiling assembly, or 
floor-subfloor assembly where damage may result 
from a leaking water heater, a watertight pan of 
corrosion-resistant materials shall be installed 
beneath the water heater with a minimum three- 
quarter (3/4) inch (20 mm) diameter drain to an 
approved location. 

508.5 Relief Valve Discharge. 

Discharge from a relief valve into a water heater pan 
shall be prohibited. 

508.6 Added or Converted Equipment. When 
additional or replacement equipment is installed or an 
appliance is converted to gas from another fuel, the 
location in which the equipment is to be operated 
shall be checked to verify the following: 

508.6.1 Air for combustion and ventilation is 
provided where required, in accordance with the 
provisions of Section 507.0. Where existing 
facilities are not adequate, they shall be 
upgraded to Section 507.0 specifications. 

508.6.2 The installation components and 
equipment meet the clearances to combustible 
material provisions of NFPA 54 8.2.2. It shall be 
determined that the installation and operation of 
the additional or replacement equipment does 
not render the remaining equipment unsafe for 
continued operation. 

(The following reference was extracted from NFPA 54.) 

8.2.2 Clearance to Combustible Materials. Gas 
utilization equipment and their vent connectors shall be 
installed with clearances from combustible material so 
their operation will not create a hazard to persons or 
property. Minimum clearances between combustible 
walls and the back and sides of various conventional 
types of equipment and their vent connectors are 
specified in Chapters 9 and 10. (Reference can also be 
made to NFPA 211, Standard for Chimneys, Fireplaces, 
Vents, and Solid Fuel-Burning Appliances.) 

508.6.3 The venting system is constructed and 
sized in accordance with the provisions of this 
chapter. Where the existing venting system is 
not adequate, it shall be upgraded to comply 
with this chapter. [NFPA 54: 8.1.2] 



41 



508.7-508.15 



UNIFORM PLUMBING CODE 



508.7 Types of Gases. It shall be determined 
whether the gas-utilization equipment has been 
designed for use with the gas to which it will be 
cormected. No attempt shall be made to convert the 
equipment from the gas specified on the rating plate 
for use with a different gas without consulting the 
installation instruction, the serving gas supplier, or 
the equipment manufacturer for complete 
instructions. [NFPA 54: 8.1.3] 

508.8 Safety Shutoff Devices for Unlisted LP-Gas 
Equipment Used Indoors. Unlisted gas utilization 
equipment for use with undiluted liquefied 
petroleum gases and installed indoors shall be 
equipped with safety shutoff devices of the complete 
shutoff type. [NFPA 54: 8.1.4] 

508.9 Use of Air or Oxygen Under Pressure. 

Where air or oxygen under pressure is used in 
connection with the gas supply, effective means such as 
a back-pressure regulator and relief valve shall be 
provided to prevent air or oxygen from passing back 
into the gas piping. Where oxygen is used, installation 
shall be in accordance with NFPA 51, Standard for the 
Design and Installation of Oxygen-Fuel Gas Systems for 
Welding, Cutting, and Allied Processes. [NFPA 54: 8.1.5] 

508.10 Protection of Gas Equipment from Fumes 
or Gases Other than Products of Combustion. 

Non-direct-vent type gas appliances installed in 
beauty shops, barber shops, or other facilities where 
chemicals that generate corrosive or flammable 
products such as aerosol sprays are routinely used, 
shall be located in an equipment room separate or 
partitioned off from other areas with provisions for 
combustion and dilution air from outdoors. Direct 
vent equipment shall be installed in accordance with 
the appliance manufacturer's installation 
instructions. [NFPA 54: 8.1.6] 

508.11 Process Air. In addition to air needed for 
combustion in commercial or industrial processes, 
process air shall be provided as required for cooling 
of equipment or material, controlling dew point, 
heating, drying, oxidation, dilution, safety exhaust, 
odor control, air for compressors and for comfort 
and proper working conditions for personnel. 
[NFPA 54: 8.1.7] 

508.12 Building Structural Members. 

508.12.1 Structural members of a building shall 
not pass through gas utilization equipment 
having an operating temperature in excess of 
500°F (260°C). 

508.12.2 Structural members passing through 
gas utilization equipment having an operating 
temperature of 500°F (260°C) or less shall be of 
noncombustible material. Building columns, 
girders, beams, or trusses shall not be installed 



within equipment, unless insulation and 
ventilation are provided to avoid all 
deterioration in strength and linear expansion of 
the building structure in either a vertical or a 
horizontal direction. 

508.12.3 Gas utilization equipment shall be 
furnished either with load-distributing bases or 
with a sufficient number of supports to prevent 
damage to either the building structure or 
equipment. 

508.12.4 At the locations selected for 
installation of gas utilization equipment, the 
dynamic and static load-carrying capacities of 
the building structure shall be checked to 
determine whether they are adequate to carry 
the additional loads. The equipment shall be 
supported and shall be connected to the piping 
so as not to exert undue stress on the 
connections. [NFPA 54: 8.1.8] 

508.13 Flammable Vapors. Gas appliances shall 
not be installed in areas where the open use, 
handling, or dispensing of flammable liquids 
occurs, unless the design, operation, or installation 
reduces the potential of ignition of the flammable 
vapors. Gas utilization equipment installed in 
compliance with 508.14, 508.15, or 508.16 shall be 
considered to comply with the intent of this 
provision. [NFPA 54: 8.1.9] 

508.14 Installation in Residential Garages. 

(1) Gas utilization equipment in residential 
garages and in adjacent spaces that open to 
the garage and are not part of the living 
space of a dwelling unit shall be installed so 
that all burners and burner-ignition devices 
are located not less than 18 in. (450 mm) 
above the floor unless listed as flammable 
vapor ignition resistant. 

(2) Such equipment shall be located or 
protected so it is not subject to physical damage 
by a moving vehicle. 

(3) When appliances are installed in a separate, 
enclosed space having access only from 
outside of the garage, such equipment may 
be installed at floor level, providing the 
required combustion air is taken from the 
exterior of the garage. [NFPA 54: 8.1.10.3] 

508.15 Installation in Commercial Garages. 

508.15.1 Parking Structures. Gas utilization 
equipment installed in enclosed, basement, and 
underground parking structures shall be 
installed in accordance with NFPA 88 A, Standard 
for Parking Structures. 

508.15.2 Repair Garages. Gas utilization 
equipment installed in repair garages shall be 



42 



WATER HEATERS 



508.15-508.24 



installed in a detached building or room, 
separated from repair areas by walls or partitions, 
floors, or floor ceiling assemblies that are 
constructed so as to prohibit the transmission of 
vapors and having a fire resistance rating of not 
less than 1 hour, and that have no openings in the 
wall separating the repair area within 8 ft (2.5 m) 
of the floor. Wall penetrations shall be 
firestopped. Air for combustion purposes shall be 
obtained from outside the building. The heating 
room shall not be used for the storage of 
combustible materials. 

Exception No. 1: Overhead heaters where 
installed not less than 8 ft (2.5 m) above the 
floor shall be permitted. 

Exception No. 2: Heating equipment for 
vehicle repair areas where there is no 
dispensing or transferring of Class I or Class 
II flammable or combustible liquids or 
liquefied petroleum gas shall be installed in 
accordance with NFPA 30A, Automotive 
and Marine Service Station Code. 
[NFPA 54: 8.1.11.2] 

508.16 Installation in Aircraft Hangars. Heaters 
in aircraft hangars shall be installed in accordance 
with NFPA 409, Standard on Aircraft Hangars. 
[NFPA 54: 8.1.12] 

508.17 Gas Equipment Physical Protection. 

Where it is necessary to locate gas utilization 
equipment close to a passageway traveled by vehicles 
or equipment, guardrails or bumper plates shall be 
installed to protect the equipment from damage. 
[NFPA 54: 8.1.13] 

508.18 Venting of Flue Gases. Gas utilization 
equipment shall be vented in accordance with the 
provisions of this chapter and NFPA 54 Chapter 10. 
[NFPA 54: 8.1.14] 

508.19 Extra Device or Attachment. No device or 
attachment shall be installed on any gas utilization 
equipment that could in any way impair the 
combustion of gas. [NFPA 54: 8.1.15] 

508.20 Adequate Capacity of Piping. When 
additional gas utilization equipment is being 
connected to a gas piping system, the existing 
piping shall be checked to determine if it has 
adequate capacity. (See Section 1209.4.3.) Where 
inadequate, the existing system shall be enlarged as 
necessary, or separate gas piping of adequate 
capacity shall be run from the point of delivery to 
the equipment. [NFPA 54: 8.1.16] 

508.21 Avoiding Strain on Gas Piping. Gas 

utilization equipment shall be supported and so 
connected to the piping as not to exert undue strain 
on the connections. [NFPA 54: 8.1.17] 



508.22 Gas Appliance Pressure Regulators. 

Where the gas supply pressure is higher than that at 
which the gas utilization equipnient is designed to 
operate or varies beyond the design pressure limits 
of the equipment, a gas appliance pressure regulator 
shall be installed. [NFPA 54: 8.1.18] 

508.23 Venting of Gas Appliance Pressure 
Regulators. Venting of gas appliance pressure 
regulators shall comply with the following 
requirements: 

508.23.1 Gas appliance pressure regulators 
requiring access to the atmosphere for successful 
operation shall be equipped with vent piping 
leading outdoors or, if the regulator vent is an 
integral part of the equipment, into the 
combustion chamber adjacent to a continuous 
pilot, unless constructed or equipped with a vent 
limiting means to limit the escape of gas from the 
vent opening in the event of diaphragm failure. 

508.23.2 Vent limiting means shall be employed 
on listed gas appliance pressure regulators only. 

508.23.3 In the case of vents leading outdoors, 
means shall be employed to prevent water from 
entering this piping and also to prevent blockage 
of vents by insects and foreign matter. 

508.23.4 Under no circumstances shall a 
regulator be vented to the gas utilization 
equipment flue or exhaust system. 

508.23.5 In the case of vents entering the 
comibustion chamber, the vent shall be located so 
the escaping gas will be readily ignited by the 
pilot and the heat liberated thereby will not 
adversely affect the normal operation of the 
safety shutoff system. The terminus of the vent 
shall be securely held in a fixed position relative to 
the pilot. For manufactured gas, the need for a flame 
arrester in the vent piping shall be determined. 

508.23.6 Vent lines from a gas appliance 
pressure regulator and a bleed lines from a 
diaphragm-type valve shall not be connected to a 
common manifold terminating in a combustion 
chamber. Vent lines shall not terminate in 
positive-pressure-type combustion chambers. 
[NFPA 54: 8.1.19] 

508.24 Bleed Lines for Diaphragm-Type Valves. 

Bleed lines shall comply with the following 
requirements: 

508.24.1 Diaphragm-type valves shall be 
equipped to convey bleed gas to the outside 
atmosphere or into the combustion chamber 
adjacent to a continuous pilot. 

508.24.2 In the case of bleed lines leading 
outdoors, means shall be employed to prevent 



43 



508.24 - 509.2 



UNIFORM PLUMBING CODE 



water from entering this piping and also to prevent 
blockage of vents by insects and foreign matter. 

508.24.3 Bleed lines shall not terminate in the 
gas utilization equipment flue or exhaust 
system. 

508.24.4 In the case of bleed lines entering the 
combustion chamber, the bleed line shall be 
located so the bleed gas will be readily ignited by 
the pilot and the heat liberated thereby will not 
adversely affect the normal operation of the 
safety shutoff system. The terminus of the bleed 
line shall be securely held in a fixed position 
relative to the pilot. For manufactured gas, the 
need for a flame arrester in the bleed line piping 
shall be determined. 

508.24.5 Bleed lines from a diaphragm-type 
valve and vent lines from a gas appliance 
pressure regulator shall not be connected to a 
common manifold terminating in a combustion 
chamber. Bleed lines shall not terminate in 
positive-pressure-type combustion chambers. 
[NFPA 54: 8.1.20] 

508.25 Combination of Equipment. Any 

combination of gas utilization equipment, 
attachments, or devices used together in any manner 
shall comply with the standards that apply to the 
individual equipment. [NFPA 54: 8.1.21] 

508.26 Installation Instructions. The installing 
agency shall conform with the equipment 
manufacturers' recommendations in completing an 
installation. The installing agency shall leave the 
manufacturers' installation, operating, and 
maintenance instructions in a location on the 
premises where they will be readily available for 
reference and guidance of the Authority Having 
Jurisdiction, service personnel, and the owner or 
operator. [NFPA 54: 8.1.22] 

508.27 Protection of Outdoor Equipment. Gas 

utilization equipment not listed for outdoor 
installation but installed outdoors shall be provided 
with protection to the degree that the environment 
requires. Equipment listed for outdoor installation 
shall be permitted to be installed without protection 
in accordance with the provisions of their listing. 
(See 8.2.1.) [NFPA 54: 8.1.23] 

(The following references were extracted from NFPA 54.) 

8.2 Accessibility and Clearance. 

8.2.1 Accessibility for Service. All gas utilization 
equipment shall be located with respect to building 
construction and other equipment so as to permit 
access to the gas utilization equipment. Sufficient 
clearance shall be maintained to permit clean- 
ing of heating surfaces; the replacement of filters, 
blowers, motors, burners, controls, and vent 



. connections; the lubrication of moving parts where 
necessary; the adjustment and cleaning of burners 
and pilots; and the proper functioning of explosion 
vents, if provided. For attic installation, the passage- 
way and servicing area adjacent to the equipment 
shall be floored. 

509.0 Equipment on Roofs. 

509.1 General. 

(1) Gas-utilization equipment on roofs shall be 
designed or enclosed so as to withstand 
climactic conditions in the area in which they 
are installed. Where enclosures are provided, 
each enclosure shall permit easy entry and 
movement, shall be of reasonable height, and 
shall have at least a 30 in. (760 mm) clearance 
between the entire service access panel(s) of 
the equipment and the wall of the enclosure. 

(2) Roofs on which equipment is to be installed 
shall be capable of supporting the additional 
load or shall be reinforced to support the 
additional load. 

(3) All access locks, screws, and bolts shall be of 
corrosion-resistant material. [NFPA 54: 8.4.1] 

509.2 Installation of Equipment on Roofs. 

(1) Gas utilization equipment shall be installed in 
accordance with its listing and the 
manufacturer's installation instructions. 

(2) Equipment shall be installed on a well- 
drained surface of the roof. At least 6 ft (1.8m) 
of clearance shall be available between any 
part of the equipment and the edge of a roof 
or similar hazard or rigidly fixed rails, 
guards, parapets, or other building structures 
at least 42 in. (1.1 m) in height shall be 
provided on the exposed side. 

(3) All equipment requiring an external source of 
electrical power for its operation shall be 
provided with (1) a readily accessible 
electrical disconnecting means within sight 
of the equipment that will completely 
deenergize the equipment, and (2) a 120-V ac 
grounding-type receptacle outlet on the roof 
adjacent to the equipment. The receptacle 
outlet shall be on the supply side of the dis- 
connect switch. 

(4) Where water stands on the roof at the 
equipment or in the passageways to the 
equipment, or where the roof is of a design 
having a water seal, a suitable platform, 
walkway, or both shall be provided above the 
water line. Such platforms or walkways shall 
be located adjacent to the equipment and 



44 



WATER HEATERS 



509.2-510.2 



control panels so that the equipment can 
be safely serviced where water stands on the 
roof. [NFPA 54: 8.4.2] 

509.3 Access to Equipment on Roofs. 

509.3.1 Gas utilization equipment located on 
roofs or other elevated locations shall be accessible. 

509.3.2 Buildings more than 15 ft (4.6 m) in 
height shall have an inside means of access to 
the roof, unless other means acceptable to the 
Authority Having Jurisdiction are used. 

509.3.3 The inside means of access shall be a 
permianent, or fold-away inside stairway or 
ladder, terminating in an enclosure, scuttle, or 
trap door. Such scuttles or trap doors shall be at 
least 22 in. x 24 in. (560 mm x 610 mm) in size, 
shall open easily and safely under all conditions, 
especially snow, and shall be constructed so as to 
permit access from the roof side unless 
deliberately locked on the inside. 

At least 6 ft (1.8 m) of clearance shall be 
available between the access opening and the 
edge of the roof or similar hazard, or rigidly fixed 
rails or guards a minimum of 42 in. (1.1 m) in 
height shall be provided on the exposed side. 
Where parapets or other building structures are 
utilized in lieu of guards or rails, they shall be a 
minimum of 42 in. (1.1 m) in height. 

509.3.4 Permanent lighting shall be provided at 
the roof access. The switch for such lighting 
shall be located inside the building near the 
access means leading to the roof. [NFPA 54: 8.4.3] 

510.0 Venting of Equipment. 

510.1 General. This section recognizes that the 
choice of venting materials and the methods of 
installation of venting systems are dependent on the 
operating characteristics of the gas utilization 
equipment. The operating characteristics of vented 
gas utilization equipment can be categorized with 
respect to (1) positive or negative pressure within the 
venting system and (2) whether or not the 
equipment generates flue or vent gases that can 
condense in the venting system. See Section 3.3 for 
the definition of these vented appliance categories. 
[NFPA 54:10.1] 

510.2 Specification for Venting. 

510.2.1 Connection to Venting Systems. 

Except as permitted in 510.2.2 through 510.2.6, all 
gas utilization equipment shall be cormected to 
venting systems. 

510.2.2 Equipment Not Required to Be 
Vented. The following equipment shall not be 
required to be vented: 



510.2.2.1 Listed Ranges. 

510.2.2.2 Built-in Domestic Cooking Units 
Listed and Marked for Optional Venting. 

510.2.2.3 Listed Hot Plates and Listed 
Laundry Stoves. 

510.2.2.4 Listed Type 1 clothes dryers shall 
be exhausted to the outside air. [NFPA 54:9.4] 

510.2.2.5 A single listed booster-type 
(automatic instantaneous) water heater, 
when designed and used solely for the 
sanitizing rinse requirements of a 
dishwashing machine, provided that the 
equipment is installed with the draft hood in 
place and unaltered if a draft hood is 
required, in a commercial kitchen having a 
mechanical exhaust system; where installed 
in this manner, the draft hood outlet shall 
not be less than 36 in. (910 mm) vertically 
and 6 in. (150 mm) horizontally from any 
surface other than the equipment. 

510.2.2.6 Listed Refrigerators. 

510.2.2.7 Counter appliances . 

510.2.2.8 RESERVED 

510.2.2.9 Direct Gas-Fired Makeup Air 
Heaters. 

510.2.2.10 Other Equipment Listed for 
Unvented Use and Not Provided with Flue 
Collars. 

51 0.2.2.1 1 Specialized Equipment of Limited 
Input such as Laboratory Burners or Gas 
Lights. Where any or all of this equipment in 
510.2.2.5 through 510.2.2.11 is installed so the 
aggregate input rating exceeds 20 Btu/h/ff 
(207 W/m^) of room or space in which it is 
installed, one or more shall be provided with 
venting systems or other approved means for 
removing the vent gases to the outside 
atmosphere so the aggregate input rating of 
the remaining unvented equipment does not 
exceed 20 Btu/h/ff (207 W/m^). Where the 
calculation includes the volume of an adjacent 
room or space, the room or space in wliich the 
equipment is installed shall be directly 
connected to the adjacent room or space by a 
doorway, archway, or other opening of 
comparable size that cannot be closed. 

510.2.3 Ventilating Hoods. Ventilating hoods 
and exhaust systems shall be permitted to be 
used to vent gas utilization equipment installed in 
commercial applications (see 510.3.5) and to vent 
industrial equipment, particularly where the 
process itself requires fume disposal. [NFPA 
54:10.2.3] 



45 



510.2-510.5 



UNIFORM PLUMBING CODE 



510.2.4 Well- Ventilated Spaces. The operation of 
industrial gas utilization equipment such that its 
flue gases are discharged directly into a large and 
well-ventilated space shall be permitted. 

510.2.5 Direct- Vent Equipment. Listed direct- 
vent gas utilization equipment shall be 
considered properly vented where installed in 
accordance with the terms of its listing, the 
manufacturers' instructions, and section 510.8(3) 
of this code. 

510.2.6 Equipment with Integral Vents. Gas 

utilization equipment incorporating integral 
venting means shall be considered properly 
vented where installed in accordance with its 
listing, the manufacturers' instructions, and 
Sections 510.8(1) and (2) of this code. [NFPA 
54:10.2.6] 

510.3 Design and Construction. 

510.3.1 Minimum Safe Performance. A venting 
system shall be designed and constructed so as to 
develop a positive flow adequate to remove flue or 
vent gases to the outside atmosphere. 

510.3.2 Equipment Draft Requirements. A 

venting system shall satisfy the draft 
requirements of the equipment in accordance 
with the manufacturer's instructions. 

510.3.3 Design and Construction. Gas 

utilization equipment required to be vented shall 
be connected to a venting system designed and 
installed in accordance with the provisions of 
Sections 510.4 through 510.15 of this code. 

510.3.4 Mechanical Draft Systems. 

510.3.4.1 Mechanical draft systems shall be 
listed and shall be installed in accordance 
with the terms of their listing and both the 
appliance and the mechanical draft system 
manufacturers' instructions. 

510.3.4.2 Gas utilization equipment 
requiring venting shall be permitted to be 
vented by means of mechanical draft 
systems of either forced or induced draft 
design. 

Exception: Incinerators. 

510.3.4.3 Forced draft systems and all 
portions of induced draft systems under 
positive pressure during operation shall be 
designed and installed so as to prevent 
leakage of flue or vent gases into a building. 

51 0.3.4.4 Vent connectors serving equipment 
vented by natural draft shall not be connected 
into any portion of mechanical draft systems 
operating under positive pressure. 

510.3.4.5 Where a mechanical draft system 



is employed, provision shall be made to 
prevent the flow of gas to the main burners 
when the draft system is not performing so as 
to satisfy the operating requirements of the 
equipment for safe performance. 

510.3.4.6 The exit terminals of mechanical 
draft systems shall be not less than 7 ft (2.1 m) 
above grade where located adjacent to public 
walkways and shall be located as specified in 
Sections 510.8(1) and (2) of this code. 

510.3.5 Ventilating Hoods and Exhaust 
Systems. 

510.3.5.1 Ventilating hoods and exhaust 
systems shall be permitted to be used to vent 
gas utilization equipment installed in 
commercial applications. 

51 0.3.5.2 Where automatically operated gas 
utilization equipment is vented through a 
ventilating hood or exhaust system equipped 
with a damper or with a power means of 
exhaust, provisions shall be made to allow 
the flow of gas to the main burners only 
when the damper is open to a position to 
properly vent the equipment and when the 
power means of exhaust is in operation. 

510.3.6 Circulating Air Ducts and Furnace 
Plenums. No portion of a venting system shall 
extend into or pass through any circulating air 
duct or furnace plenum. [NFPA 54:10.3.6] 

510.4 Type of Venting System to Be Used. 

510.4.1 The type of venting system to be used 
shall be in accordance with Table 5-3. 

510.4.2 Plastic Piping. Plastic piping used for 
venting equipment listed for use with such 
venting materials shall be approved. 

510.4.3 Special Gas Vent. Special gas vent shall 
be listed and installed in accordance with the 
terms of the special gas vent listing and the 
manufacturers' instructions. [NFPA 54:10.4.3] 

510.5 Masonry, Metal, and Factory-Built 
Chimneys. 

510.5.1 Listing or Construction. 

510.5.1.1 Factory -built chimneys shall be 
installed in accordance with their listing and 
the manufacturers' instructions. Factory-built 
chimneys used to vent appliances that 
operate at positive vent pressure shall be 
listed for such application. 

510.5.1.2 Metal chimneys shall be built and 
installed in accordance with NFPA 211, 
Standard for Chimneys, Fireplaces, Vents, and 
Solid Fuel-Burning Appliances. 



46 



WATER HEATERS 



510.5 



510.5.1.3 Masonry chimneys shall be built 
and installed in accordance with NFPA 211, 
Standard for Chimneys, Fireplaces, Vents, and 
Solid Fuel-Burning Appliances, and lined with 
approved clay flue lining, a listed chimney 
lining system, or other approved material 
that will resist corrosion, erosion, softening, 
or cracking from vent gases at temperatures 
up to 1800°F (982°C). 

Exception: Masonry chimney flues lined 
with a chimney lining system specifically 
listed for use with listed gas appliances 
with draft hoods. Category I appliances, 
and other gas appliances listed for use 
with Type B vents shall be permitted. The 
liner shall be installed in accordance with the 
liner manufacturer's instructions and the 
terms of the listing. A permanent identifying 
label shall be attached at the point where 
the connection is to be made to the liner. 
The label shall read: "This chimney liner is 
for appliances that bum gas only. Do not 
connect to solid or liquid-fuel-buming 
appliances or incinerators." 

510.5.2 Termination. 

510.5.2.1 A chimney for residential-type or 
low-heat gas utilization equipment shall 
extend at least 3 ft (0.9 m) above the highest 
point where it passes through a roof of a 
building and at least 2 ft (0.6 m) higher than 
any portion of a building within a horizontal 
distance of 10 ft (3.0 m). [See Figure 5-1.] 

510.5.2.2 A chimney for medium-heat 
equipment shall extend at least 10 ft (3.0 m) 
higher than any portion of any building 
within 25 ft (7.6 m). 

51 0.5.2.3 A chiminey shall extend at least 5 ft 
(1.5 m) above the highest connected equip- 
ment draft hood outlet or flue collar. 

510.5.2.4 Decorative shrouds shall not be 
installed at the termination of factory-built 
chimneys except where such shrouds are 
listed and labeled for use with the specific 
factory-built chimney system and are 
installed in accordance with manufacturers' 
installation instructions. 

510.5.3 Size of Chimneys. The effective area of 
a chimney venting system serving listed gas 
appliances with draft hoods. Category I 
appliances, and other appliances listed for use 
with Type B vents shall be in accordance with 
one of the following methods: 

(1) This chapter and NFPA 54: Chapter 13. 

(2) For sizing an individual chimney venting 
system for a single appliance with a draft 



hood, the effective areas of the vent 
connector and chimney flue shall be not less 
than the area of the appliance flue collar or 
draft hood outlet or greater than seven times 
the draft hood outlet area. 

(3) For sizing a chimney venting system connected 
to two appliances with draft hoods, the 
effective area of the chimney flue shall be 
not less than the area of the larger draft hood 
outlet plus 50 percent of the area of the 
smaller draft hood outlet, or greater than 
seven times the smallest draft hood outlet area. 

(4) Other approved engineering methods. 

(5) Chimney venting systems using mechanical 
draft shall be sized in accordance with approved 
engineering methods. Where an incinerator is 
vented by a chimney serving other gas 
utilization equipment, the gas input to the 
incinerator shall not be included in calculating 
chimney size, provided the chimney flue 
diameter is not less than 1 in. (25 mm) larger 
in equivalent diameter than the diameter of 
the incinerator flue outlet. 

510.5.4 Inspection of Cliimneys. 

(A) Before replacing an existing appliance or 
connecting a vent connector to a chimney, 
the chimney passageway shall be examined 
to ascertain that it is clear and free of 
obstructions and shall be cleaned if 
previously used for venting solid- or liquid- 
fuel-burning appliances or fireplaces. 

(B) Chimneys shall be lined in accordance with 
NFPA 211, Standard for Chimneys, Fireplaces, 
Vents, and Solid-Fuel Burning Appliances. 

(C) Cleanouts shall be examined to determine 
that they will remain tightly closed when 
not in use. 

(D) When inspection reveals that an existing 
chimney is not safe for the intended 
application, it shall be repaired, rebuilt, 
lined, relined, or replaced with a vent or 
chimney to conform to NFPA 211, Standard 
for Chimneys, Fireplaces, Vents, and Solid- 
Fuel-Burning Appliances, and shall be 
suitable for the equipment to be attached. 

510.5.5 Chimney Serving Equipment Burning 
Other Fuels. 

510.5.5.1 Gas utilization equipment shall 
not be connected to a chimney flue serving a 
separate appliance designed to bum soUd fuel. 

510.5.5.2 Where one chimney serves gas 
utilization equipment and equipment 
burning liquid fuel, the equipment shall be 
connected through separate openings or 
shall be connected through a single opening 



47 



510.5-510.6 



UNIFORM PLUMBING CODE 



where joined by a suitable fitting located as 
close as practical to the chimney. Where two 
or more openings are provided into one 
chimney flue, they shall be at different 
levels. Where the gas utilization equipment 
is automatically controlled, it shall be 
equipped with a safety shutoff device. 

TABLE 5-3 
Type of Venting System to Be Used 



Gas Utilization Equipment 



Type of Venting System 



Listed Category I equipment 
Listed equipment equipped 

with draft hood 
Equipment listed for use with 
Type B gas vent 
system for gas venting 



Type B gas vent (510.6) 
Chimney (510.5) 
Single-wall metal pipe 
(510.7) 
Listed chimney lining 

(510.5.1.3) 
Special gas vent listed 
for this equipment 
(510.4.3) 



Listed vented wall furnaces 



Type B-W gas vent 
(510.6, NFPA 54:9.27) 



Category II equipment 
Category III equipment 
Category IV equipment 



As specified or 

furnished 

by manufacturers of 

listed 

equipment (510.4.2, 

510.4.3) 



Incinerators, outdoors 



Single-wall metal pipe 
(510.7, 510.7.3.3) 



Incinerators, indoors 

Equipment that can be converted 
to use of solid fuel 

Unlisted combination gas- and 
oil-burning equipment 

Combination gas- and solid-fuel- 
burning equipment 

Equipment listed for use with 
chimneys only 

Unlisted equipment 



Chimney (510.5) 



Listed combination gas- and 
oil-burning equipment 


Type L vent (510.6) or 
chimney (510.5) 


Decorative appliance in 
fireplace 


vented 


Chimney (907.2.3) 


Gas-fired toilets 




Single-wall metal pipe 
(510.7, NFPA 54: 9.25.3) 


Direct- vent equipment 




See 510.2.5 


Equipment with Integra 


I vent 


See 510.2.6 



[NFPA 54: Table 10.4.1] 



510.5.5.3 A listed combination gas- and 
solid-fuel-burning appliance connected to a 



single chimney flue shall be equipped with a 
manual reset device to shut off gas to the 
main burner in the event of sustained 
backdraft or flue gas spillage. The chimney 
flue shall be sized to properly vent the 
appliance. 

510.5.5.4 A single chimney flue serving a 
listed combination gas- and oil-burning 
appliance shall be sized to properly vent the 
appliance. 

510.5.6 Support of Chimneys. All portions of 
chimneys shall be supported for the design and 
weight of the materials employed. Listed 
factory-built chimneys shall be supported and 
spaced in accordance with their listings and the 
manufacturers' instructions. 

510.5.7 Cleanouts. Where a chimney that 
formerly carried flue products from liquid- or 
solid-fuel-burning appliances is used with an 
appliance using fuel gas, an accessible cleanout 
shall be provided. The cleanout shall have a 
tight-fitting cover and be installed so its upper 
edge is at least 6 in. (150 mm) below the lower 
edge of the lowest chimney inlet opening. 

510.5.8 Space Surrounding Lining or Vent. 

51 0.5.8.1 The remaining space surrounding a 
chimney liner, gas vent, special gas vent, or 
plastic piping installed within a masonry 
chiiimey flue shall not be used to vent another 
appHance. 

Exception: The insertion of another liner 
or vent within the chimney as provided 
in this code and the liner or vent 
manufacturer's instructions. 

510.5.8.2 The remaining space surrounding 
a chimney liner, gas vent, special gas vent, 
or plastic piping installed within a masonry 
chimney flue shall not be used to supply 
combustion air. [NFPA 54: 10.5.8.2] 

Exception: Direct-vent gas-fired 
appliances designed for installation in a 
solid-fuel-burning fireplace where 
installed in accordance with the listing 
and the manufacturer's instruction. 

510.6 Gas Vents. 

510.6.1 Application. The installation of gas 
vents shall comply with the following 
requirements: 

510.6.1.1 Gas vents shall be installed in 
accordance with the terms of their listings 
and the manufacturers' instructions. 

51 0.6.1 .2 A Type B-W gas vent shall have a 
listed capacity not less than that of the listed 
vented wall furnace to which it is connected. 

51 0.6.1 .3 A gas vent passing through a roof 



48 



WATER HEATERS 



2 ft (0,6 m) 
minimum — 



/-10 ft (3.0 m)-^ 




3 ft (0.9 m) 
minimum 



Chimney 



10 ft (3.0 m) 
or less 



3 ft (0.9 m) 
minimum 




ta)T©rmiiiaiQn;10ft^(3.0,m^^ ij&^ torn Rlige, WaJI, w Ppepft 



Morethaoi 
■ 10 ft (3.0 m)- 



Wall or 



k: 



'•^fL. 



'a''-'Y«M'-^:^ 



Note: No hei^t 
above parapet 
required v^en 
distonce from walls 
or parapet Is more 
than 10 ft (3.0 m). 



"Vi 



3 ft (0.9 m) 
rrrinimum 



Height abova any 
roofsurface within 
10 ft (3,0 m) hortzontafly 




Chlrnney 



FIGURE 5-1 Typical Termination Locations for 
Chimneys and Single-Wall Metal Pipes Serving 
Residential-Type and Low-Heat Equipment 
[NFPA54:Figure 10.5.2.1] 



shall extend through the entire roof flashing, 
roof jack, or roof thimble and be terminated 
with a listed termination cap. 

510.6.1.4 Type B or Type L vents shall 
extend in a generally vertical direction with 
offsets not exceeding 45 degrees, except that 
a vent system having not more than one 
60 degree offset shall be permitted. Any 
angle greater than 45 degrees from the 
vertical is considered horizontal. The total 
horizontal distance of a vent plus the 
horizontal vent connector serving draft- 
hood-equipped appliances shall not be 
greater than 75 percent of the vertical height 
of the vent. 

Exception: Systems designed and sized 
as provided in this chapter or in 
accordance with other approved 
engineering methods. 

510.6.1.5 Vents serving Category I fan- 
assisted appliances shall be installed in 
accordance with the appliance manufacturer's 
instructions and NFPA 54 Chapter 10 or 
other approved engineering methods. 

510.6.1.6 Gas vents installed within 
masonry chimneys shall be installed in 
accordance with the terms of their listing 
and the manufacturers' installation 
instructions. Gas vents installed within 
masonry chimneys shall be identified with a 
permanent label installed at the point where 
the vent enters the chimney. The label shall 
contain the following language: "This gas 
vent is for appliances that burn gas. Do not 
connect to solid- or liquid-fuel-burning 
appliances or incinerators." 

510.6.2 Gas Vent Termination. The termination 
of gas vents shall comply with the following 
requirements: 

510.6.2.1 A gas vent shall terminate in 
accordance with one of the following: 

(1) Above the roof surface with a listed cap 
or listed roof assembly. Gas vents 12 in. 
(300 mm) in size or smaller with listed 
caps shall be permitted to be terminated 
in accordance with Figure 5-2, provided 
they are at least 8 ft (2.4 m) from a ver- 
tical wall or similar obstruction. All 
other gas vents shall terminate not less 
than 2 ft (0.6 m) above the highest point 
where they pass through the roof and at 
least 2 ft (0.6 m) higher than any portion 
of a building within 10 ft (3.1 m). 

(2) Industrial gas utilization equipment as 
provided in Section 510.2.4. 



49 



Figure 5-2 -510.6 



UNIFORM PLUMBING CODE 



Listed t,0^68t d!^ar0 opertirtg^ 



cap 



vent 




RoofpittaiJs j#12 



Is^jnimum helgW from roof 
•to- tevsfest-tf sdhargt openi 



Roof pitch heights 



Roof pitch H(minimum) ft 


m 


Flat to 6/12 


1.0 


0.30 


6/12 to 7/12 


1.25 


0.38 


Over 7/12 to 8/12 


1.5 


0.46 


Over 8/12 to 9/12 


2.0 


0.61 


Over 9/12 to 10/12 


2.5 


0.76 


Over 10/12 to 11/12 


3.25 


0.99 


Over 11/12 to 12/12 


4.0 


1.22 


Over 12/12 to 14/12 


5.0 


1.52 


Over 14/12 to 16/12 


6.0 


1.83 


Over 16/12 to 18/12 


7.0 


2.13 


Over 18/12 to 20/12 


7.5 


2.27 


Over 20/12 to 21/12 


8.0 


2.44 



FIGURE 5-2 Gas Vent Termination Locations for 
Listed Caps 12 in. (300 mm) or Less in Size at 
Least 8 ft (2.4 m) from a Vertical Wall [NFPA 54: 
Figure 10.6.2] 



IVV 




FIGURE 5-3 Plan View of Practical Separation 
Method for Multistory Gas Venting. [NFPA 54: 
Figure 10.6.4.2] 



(3) Direct-vent systems as provided in 
Section 510.2.5. 

(4) Equipment with integral vents as 
provided in Section 510.2.6. 

(5) Mechanical draft systems as provided in 
Section 510.3.4. 

(6) Ventilating hoods and exhaust systems 
as provided in Section 510.3.5. 

510.6.2.2 A Type B or a Type L gas vent 
shall terminate at least 5 ft (1.5 m) in vertical 
height above the highest connected 
equipment draft hood or flue collar. 

510.6.2.3 A Type B-W gas vent shall 
terminate at least 12 ft (3.7 m) in vertical 
height above the botton\ of the wall furnace. 

51 0.6.2.4 A gas vent extending through an 
exterior wall shall not terminate adjacent to 
the wall or below eaves or parapets, except 
as provided in Sections 510.2.5 and 510.3.4. 

510.6.2.5 Decorative shrouds shall not be 
installed at the termination of gas vents 
except where such shrouds are listed for use 
with the specific gas venting system and are 
installed in accordance with manufacturers' 
installation instructions. 

510.6.3 Size of Gas Vents. Venting systems 
shall be sized and constructed in accordance 
with NFPA 54 Chapter 10 or other approved 
engineering methods and the gas vent and gas 
equipment manufacturers' instructions. 

510.6.3.1 Category I Appliances. The 

sizing of natural draft venting systems 
serving one or more listed appliances 
equipped with a draft hood or appliances 
listed for use with Type B gas vent, installed 
in a single story of a building, shall be in 
accordance with one of the following 
methods. 

(1) The provisions of this chapter. 

(2) Vents serving fan-assisted combustion 
system appliances, or combinations of 
fan-assisted combustion system and 
draft-hood-equipped appliances shall 
be sized in accordance with this chapter 
or other approved engineering methods. 

(3) For sizing an individual gas vent for a 
single, draft-hood-equipped appliance, 
the effective area of the vent connector 
and the gas vent shall be not less than 
the area of the appliance draft hood 
outlet or greater than seven times the 
draft hood outlet area. 



50 



WATER HEATERS 



510.6-510.7 



(4) For sizing a gas vent connected to two 
appliances with draft hoods, the effective 
area of the vent shall be not less than the 
area of the larger draft hood outlet plus 
50 percent of the area of the smaller draft 
hood outlet or greater than seven times 
the smaller draft hood outlet area. 

(5) Approved engineering practices. 

510.6.3.2 Category II, Category III, and 
Category IV Appliances. The sizing of gas 
vents for Category II, Category III, and 
Category IV gas utilization equipment shall 
be in accordance with the equipment 
manufacturers' instructions. 

510.6.3.3 Sizing. Chimney venting systems 
using mechanical draft shall be sized in 
accordance with approved engineering 
methods. 

510.6.4 Gas Vents Serving Equipment on 
More Than One Floor. A single or common gas 
vent shall be permitted in multistory installations 
to vent Category I gas utilization equipment 
located on more than one floor level, provided 
the venting system is designed and installed in 
accordance with approved engineering methods. 

All gas utilization equipment connected to 
the common vent shall be located in rooms 
separated from habitable space. Each of these 
rooms shall have provisions for an adequate 
supply of combustion, ventilation, and dilution 
air that is not supplied from habitable space. 
(See Figure 5-3.) 

The size of the connectors and common 
segments of multistory venting systems for gas 
utilization equipment listed for use with Type B 
double-wall gas vent shall be in accordance with 
Table 5-14, provided: 

(1) The available total height (H) for each 
segment of a multistory venting system is 
the vertical distance between the level of 
the highest draft hood outlet or flue collar 
on that floor and the centerline of the next 
highest interconnection tee. (See Figure 
G.l(K).) 

(2) The size of the connector for a segment is 
determined from its gas utilization equipment 
heat input and available connector rise, and 
shall not be smaller than the draft hood 
outlet or flue collar size. 

(3) The size of the common vertical vent 
segment, and of the interconnection tee at 
the base of that segment, shall be based on 
the total gas utilization equipment heat 
input entering that segment and its available 
total height. 



510.6.5 Support of Gas Vents. Gas vents shall 
be supported and spaced in accordance with 
their listings and the manufacturers' instructions. 

510.6.6 Marking. In those localities where solid 
and liquid fuels are used extensively, gas vents 
shall be permanently identified by a label 
attached to the wall or ceiling at a point where 
the vent connector enters the gas vent. The label 
shall read: "This gas vent is for appliances that 
burn gas. Do not connect to solid- or liquid-fuel- 
burning appliances or incinerators." The 
Authority Having Jurisdiction shall determine 
whether its area constitutes such a locality. 
[NFPA 54:10.6.6] 

Figure 5-4 RESERVED 

510.7 Single-Wail Metal Pipe. 

510.7.1 Construction. Single-wall metal pipe 
shall be constructed of galvanized sheet steel not 
less than 0.0304 in. (0.7 mm) thick or of other 
approved, noncombustible, corrosion-resistant 
material. 

510.7.2 Cold Climate. Urunsulated single-wall 
metal pipe shall not be used outdoors in cold 
climates for venting gas utilization equipment. 

510.7.3 Termination. The termination of single- 
wall metal pipe shall comply with the following 
requirements: 

510.7.3.1 Single-wall metal pipe shall 
terminate at least 5 ft (1.5 m) in vertical 
height above the highest connected 
equipment draft hood outlet or flue collar. 

510.7.3.2 Single-wall metal pipe shall 
extend at least 2 ft (0.6 m) above the highest 
point where it passes through the roof of a 
building and at least 2 ft (0.6 m) higher than 
any portion of a building within a 
horizontal distance of 10 ft (3.1 m). [See 
Figure 5-1.] 

51 0.7.3.3 An approved cap or roof assembly 
shall be attached to the terminus of a single- 
wall metal pipe. [Also see 510.7.4.3.] 

510.7.4 Installation with Equipment Permitted 
by 510.4.1. 

510.7.4.1 Single-wall metal pipe shall be 
used only for runs directly from the space 
in which the gas utilization equipment is 
located through the roof or exterior wall to 
the outer air. A pipe passing through a 
roof shall extend without interruption 
through the roof flashing, roof jacket, or 
roof thimble. 

510.7.4.2 Single-wall metal pipe shall not 
originate in any unoccupied attic or 



51 



51 0.7 -Table 5-4 



UNIFORM PLUMBING CODE 



concealed space and shall not pass through 
any attic, inside wall, concealed space, or 
floor. [For the installation of a single-wall 
metal pipe through an exterior combustible 
wall, see 510.10.14.2.] 

510.7.4.3 Single-wall metal pipe used for 
venting an incinerator shall be exposed and 
readily examinable for its full length and 
shall have suitable clearances maintained. 

510.7.4.4 Minimum clearances from single- 
wall metal pipe to combustible material shall 
be in accordance with Table 5-4. Reduced 
clearances from single-wall metal pipe to 
combustible material shall be as specified for 
vent cormectors in Table 5-5. 

510.7.4.5 Where a single-wall metal pipe 
passes through a roof constructed of 
combustible material, a noncombustible, 
nonventilating thimble shall be used at the 
point of passage. The thimble shall extend at 
least 18 in. (460 mm) above and 6 in. (150 
mm) below the roof with the annular space 



open at the bottom and closed only at the 
top. The thimble shall be sized in accordance 
with 510.10.14(2). 

510.7.5 Size of Single-Wall Metal Pipe. Single- 
wall metal piping shall comply with the 
following requirements: 

510.7.5.1 A venting system of a single-wall 
metal pipe shall be sized in accordance with 
one of the following methods and the gas 
equipment manufacturer's instructions: 

(1) For a draft-hood-equipped appliance, in 
accordance with this chapter. 

(2) For a venting system for a single 
appliance with a draft hood, the areas of 
the connector and the pipe each shall 
not be less than the area of the 
appliance flue collar or draft hood 
outlet, whichever is smaller. The vent 
area shall not be greater than seven 
times the draft hood outlet area. 

(3) Other approved engineering methods. 

510.7.5.2 Where a single-wall metal pipe is 



TABLE 5-4 
Clearance for Connectors [NFPA 54: Table 10.7.4.4] 



Minimum Distance from Combustible Material 



Equipment 



Listed Type B 
Gas Vent Material 



Listed Type L 
Vent Material 



Single-Wall 
Metal Pipe 



Factory-Built 
Chimney Sections 



Listed equipment with 
draft hoods and equip- 
ment listed for use with 
Type B gas vents 



As listed 



As listed 



6 in. 



As listed 



Residential boilers and 
furnaces with listed gas 
conversion burner and 
with draft hood 



6 in. 



6 in. 



9 in. 



As listed 



Residential appliances 
listed for use with Type L 
vents 


Not permitted 


As listed 


9 in. 


As listed 


Residential incinerators 


Not permitted 


9 in. 


18 in. 


As listed 


Listed gas-fired toilets 


Not permitted 


As listed 


As listed 


As listed 


Unlisted residential 
appliances with draft 
hood 


Not permittted 


6 in. 


9 in. 


As listed 


Residential and low-heat 
equipment other than 
those above 


Not permitted 


9 in. 


18 in. 


As listed 


Medium-heat equipment 


Not permitted 


Not permitted 


36 in. 


As listed 



For SI units, 1 in.= 25.4 mm. 

Note: These clearances shall apply unless the listing of an appliance or cormector specifies clearances, in which case the listed clearances 

shall apply. 



52 



WATER HEATERS 



510.7-510.10 



used and has a shape other than round, it 
shall have an equivalent effective area equal 
to the effective area of the round pipe for 
which it is substituted, and the minimum 
internal dimension of the pipe shall be 2 in. 
(50 mm). 

510.7.5.3 The vent cap or a roof assembly 
shall have a venting capacity not less than 
that of the pipe to which it is attached. 

510.7.6 Support of Single-Wall Metal Pipe. 

All portions of single-wall metal pipe shall be 
supported for the design and weight of the 
material eniployed. 

510.7.7 Marking. Single-wall metal pipe shall 
comply with the marking provisions of 510.6.6. 
[NFPA 54:10.7.7] 

510.8 Through-the-Wall Vent Termination. (See 

Figure 5-13) 

51 0.8.1 A mechanical draft venting system shall 
terminate at least 3 ft (0.9 m) above any forced 
air inlet located within 10 ft (3.1 m). 

Exception No. 1: This provision shall not 
apply to the combustion air intake of a 
direct- vent appliance. 

Exception No. 2: This provision shall not 
apply to the separation of the integral 
outdoor air inlet and flue gas discharge of 
listed outdoor appliances. 

510.8.2 A mechanical draft venting system of 
other than direct-vent type shall terminate at 
least 4 ft (1.2 m) below, 4 ft (1.2 m) horizontally 
from, or 1 ft (300 mm) above any door, operable 
window, or gravity air inlet into any building. 
The bottom of the vent terminal shall be located 
at least 12 in. (300 mm) above grade. 

510.8.3 The vent terminal of a direct-vent 
appliance with an input of 10,000 Btu/h (3 kW) 
or less shall be located at least 6 in. (150 mm) 
from any air opening into a building, and such 
an appliance with an input over 10,000 Btu/h (3 
kW) but not over 50,000 Btu/h (14.7 kW) shall be 
installed with a 9-in. (230-mm) vent termination 
clearance, and an appliance with an input over 
50,000 Btu/h (14.7 kW) shall have at least a 12 in. 
(300-mm) vent termination clearance. The 
bottom of the vent terminal and the air intake 
shall be located at least 12 in. (300 mm) above grade. 

510.8.4 Through-the-wall vents for Category 11 
and Category IV appliances and noncategorized 
condensing appliances shall not terminate over 
public walkways or over an area where 
condensate or vapor could create a nuisance of 
hazard or could be detrimental to the operation 



of regulators, relief valves, or other equipment. 
Where local experience indicates that 
condensate is a problem with Category I and 
Category III appliances, this provision shall also 
apply. [NFPA 54:10.8.4] 

510.9 Condensation Drain. 

510.9.1 Provision shall be made to collect and 
dispose of condensate from venting systems 
serving Category 11 and Category IV gas 
utilization equipment and noncategorized 
condensing appliances in accordance with 
510.8.4. 

510.9.2 Where local experience indicates that 
condensation is a problem, provision shall be 
made to drain off and dispose of condensate 
from venting systems serving Category I and 
Category 111 gas utilization equipment in 
accordance with 510.8.4. [NFPA 54:10.9.2] 

510.10 Vent Connectors for Category I Gas 
Utilization Equipment. 

510.10.1 Where Required. A vent connector 
shall be used to connect gas utilization 
equipment to a gas vent, chimney, or single- 
wall metal pipe, except where the gas vent, 
chimney, or single-wall metal pipe is directly 
connected to the equipment. 

510.10.2 Materials. 

510.10.2.1 A vent connector shall be 
made of noncombustible, corrosion- 
resistant material capable of withstanding 
the vent gas temperature produced by the 
gas utilization equipment and of sufficient 
thickness to withstand physical damage. 

510.10.2.2 Where the vent connector used 
for gas utilization equipment having a draft 
hood or a Category I appliance is located in 
or passes through an unconditioned area, 
that portion of the vent connector shall be 
listed Type B, Type L or listed vent material 
having equivalent insulation qualities. 

Exception: Single-wall metal pipe 
located within the exterior walls of the 
building and located in areas having a 
local 99 percent winter design temperature 
of 5°F or higher. 

510.10.2.3 Where the vent connector used 
for gas utilization equipment having a draft 
hood or a Category 1 appliance is located in 
or passes through attics and crawl spaces, 
that portion of the vent connector shall be 
listed Type B, Type L or listed vent material 
having equivalent insulation qualities. 

510.10.2.4 Vent connectors for residential- 



53 



Table 5-5 



UNIFORM PLUMBING CODE 



Table 5-5 
Reduction of Clearances with Specified Forms of Protection 



Where the required clearance with no protection from appliance, vent connector, or 
single-wall metal pipe is: 



36 in. 



18 in. 



12 in. 



9 in. 



6 in. 



Allowable Clearances with Specified Protection (in.) 



Type of protection applied 
to and covering all surfaces 
of combustible material 



Use Col. 1 for clearances above appliance or horizontal connector. Use Col. 2 for 
clearances from appliances, vertical connector, and single-wall metal pipe. 



as the required clearance 




Sides 


Sides 




Sides 


Sides 




Sides 


with no protection [See 




and 


and 




and 


and 




and 


Figure 5-5 


Above 


Rear 


Above Rear 


Above 


Rear 


Above Rear 


Above 


Rear 


through Figure 5-7.] 


Col.1 


Col. 2 


Col. 1 Col. 2 


Col.1 


Col. 2 


Col. 1 Col. 2 


Col.1 


Col. 2 



(1 ) 3-1 / 2 in. thick masonry — 24 
wall without ventilated air 

space 

(2) 1/2 in. insulation board 24 18 
over 1 in. glass fiber or 

mineral wool batts 

(3) 0.024 sheet metal over 18 12 
1 in. glass fiber or mineral 

wool batts reinforced with 
wire on rear face with 
ventilated air space 

(4) 3-1 /2 in. thick masonry ~ 12 
wall with ventilated air 

space 

(5) 0.024 sheet metal with 18 12 
ventilated air space 

(6) 1 / 2 in. thick insulation 18 12 
board with ventilated air 

space 

(7) 0.024 sheet metal with 18 12 
ventilated air space over 

0.024 sheet metal with 
ventilated air space 

(8) 1 in. glass fiber or 18 12 
mineral wool batts 

sandwiched between two 
sheets 0.024 sheet metal 
with ventilated air space 



12 



12 



9 6 

9 6 



6 4 

6 4 

6 4 



5 3 

5 3 

5 3 

5 3 



3 2 

3 3 



For SI units, 1 in. = 25.4 mm. 
Notes: 

1. Reduction of clearances from combustible materials shall not interfere with combustion air, draft hood clearance and relief, and 
accessibility of servicing. 

2. All clearances shall be measured from the outer surface of the combustible material to the nearest point on the surface of the appliance, 
disregarding any intervening protection applied to the combustible material. 

3. Spacers and ties shall be of noncombustible material. No spacer or tie shall be used directly opposite the appliance or connector. 

4. Where all clearance reduction systems use a ventilated air space, adequate provision for air circulation shall be provided as described. 
[See Figure 5-6 and Figure 5-7] 

5. There shall be at least 1 in. (25 mm) between clearance reduction systems and combustible walls and ceilings for reduction systems using 
a ventilated air space. 

6. Where a wall protector is mounted on a single flat wall away from comers, it shall have a minimum 1 in. (25 mm) air gap. To provide 
adequate air circulation, the bottom and top edges, or only the side and top edges, or all edges shall be left open. 

7. Mineral wool batts (blanket or board) shall have a minimum density of 8 Ib/ff (128 kg/m^) and a minimum melting point of 1500°F (816°C). 

8. Insulation material used as part of a clearance reduction system shall have a thermal conductivity of 1.0 Btu in. /ft^ /h-°F (0.144 W/m-K) 
or less. 

9. There shall be at least 1 in. (25 mm) between the appliance and the protector. In no case shall the clearance between the appliance and the 
combustible surface be reduced below that allowed in this table. 

10. All clearances and thicknesses are minimum; larger clearances and thicknesses are acceptable. 

11. Listed single-wall cormectors shall be installed in accordance with the terms of their listing and the manufacturer's instructions. 



54 



WATER HEATERS 



Figure 5-5 -510.10 



Construction usfng combusttbi© 
material, plastered or unplastered 





j Sheet meta! Of -v 
1 other protection ^ 



" Gas equipment 
or vent conn^lor 



Notes: 

A - equals the clearance with no protection specified in 
Tables 5-4 and 5-5 and in the sections applying to 
various types of equipment. 

B - equals the reduced clearance permitted in 
accordance with Table 5-4. The protection applied to the 
construction using combustible material shall extend far 
enough in each direction to make C equal to A. 

FIGURE 5-5 Extent of Protection Necessary to 
Reduce Clearances from Gas Equipment or Vent 
Connectors. 



'"pf"''^ 




Mounted with side 
and top edgss opw 



MounSed with top 
and boitom edges 
open 



Wall protector mowrted 
on siogte flat wall 



Wall protector instaUed m corner 



Must tje mounted witti top 
and bottom edges opsn 




Naif or screw anchor 



Ctearafice 
reducltori system 



(25 mm) rtonpsmUJStiljte 
I '' spacer such as stacked washers, 
^"-""""^ $fna!)-dfamefer pipe, tubing, or 



Masonry walls can be attached to combustible walls 
using wall ties. Spacers should not be used directly 
behind appliance or connector. 

FIGURE 5-6 Wall Protection Reduction System. 



Comtiystible wall 



1 in. (25 mm| ^-*^ 
minimum air space 
between masonry 
and combustibie wait 



4in. (100mm|— • 
nominal brick wall 



Bottom and top course --^ 
of bricics staggered for 
ventilation 



A strip of heavy-gauge steet 
used for nMM support 

Note; Do not place masonry wall ties directly 
behind appliance or connector. 




CorruQaled 
rfietal wall 
ties 




Masortry wall tie 



FIGURE 5-7 Masonry Clearance Reduction 
System. 

TABLE 5-6 

Minimum Thickness for Galvanized Steel Vent 

Connector for Low-Heat Appliances 



Diameter of 
Connector (in.) 



Minimum Thickness 
(in.)* 



Less than 6 

6 to less than 10 

10 to 12 inclusive 

14 to 16 inclusive 

Over 16 



0.019 
0.023 
0.029 
0.034 
0.056 



For SI units, 1 in. = 25.4 mm; 1 in.^ = 645 mml 

type appliances shall comply with the 
following: 

(1) Vent Cormectors Not Installed in Attics, 
Crawl Spaces, or Other Unconditioned 
Areas. Vent connectors for listed gas 
appliances having draft hoods and for 
appliances having draft hoods and 
equipped with listed conversion burners 
that are not installed in attics, crawl spaces, 
or other unconditioned areas shall be one of 
the following: 

(a) Type B or Type L vent material 

(b) Galvanized sheet steel not less than 
0.018 in. (0.46 mm) thick 

(c) Aluminum (1100 or 3003 alloy or 
equivalent) sheet not less than 0.027 in. 
(0.69 mm) thick 



55 



510.10 



UNIFORM PLUMBING CODE 



(d) Stainless steel sheet not less than 0.012 in. 
(0.31 mm) thick 

(e) Smooth interior wall metal pipe having 
resistance to heat and corrosion equal to 
or greater than that of b, c, or d above 

(f ) A listed vent connector 

(2) Vent connectors shall not be covered 
with insulation. 

Exception: Listed insulated vent 
connectors shall be installed according to 
the terms of their listing. 

510.10.2.5 A vent connector for low-heat 
equipment shall be a factory-built chimney 
section or steel pipe having resistance to 
heat and corrosion equivalent to that for the 
appropriate galvanized pipe as specified in 
Table 5-6. Factory-built chimney sections 
shall be joined together in accordance with 
the chimney manufacturer's instructions. 

510.10.2.6 Vent connectors for medium- 
heat equipment and commercial and 
industrial incinerators shall be constructed 
of factory-built, medium-heat chimney 
sections or steel of a thickness not less than 
that specified in Table 5-7, and shall comply 
with the following: 

(1) A steel vent connector for equipment 
with a vent gas temperature in excess of 
1000°F (538°C) measured at the entrance to 
the connector shall be lined with medium- 
duty fire brick (ASTM C 64, Specification for 
Refractories for Incinerators and Boilers, 
Type F) or the equivalent. 

(2) The lining shall be at least 2-1/2 in. (64 
mm) thick for a vent connector having a 
diameter or greatest cross-sectional dimension 
of 18 in. (460 mm) or less. 

(3) The lining shall be at least 4-1/2 in. (110 
mm) thick laid on the 4-1/2 in. (110-mm) bed 
for a vent connector having a diameter or 
greatest cross-sectional dimension greater 
than 18 in. (460 mm). 

(4) Factory-built chimney sections, if 
employed, shall be joined together in 
accordance with the chimney manufacturer's 
instructions. 

510.10.3 Size of Vent Connector. 

510.10.3.1 A vent connector for gas 
utilization equipment with a single draft 
hood or for a Category I fan-assisted 
combustion system appliance shall be sized 



and installed in accordance with this chapter 
or other approved engineering methods. 

TABLE 5-7 

Minimum Thicltness for Steel Vent Connectors 

for l\/ledium-l-leat Equipment and Commercial and 

Industrial Incinerators 

Vent Connector Size 



Diameter (in.) Area (in.^) 



Minimum 
Thickness (in.) 



Up to 14 


Up to 154 


0.053 


Over 14 to 16 


154 to 201 


0.067 


Over 16 to 18 


201 to 254 


0.093 


Over 18 


Larger than 254 


0.123 



For SI units, 1 in. = 25.4 mm; 1 in.^ = 645 mml 
[NFPA 54: Table 9.10.2 (f)] 

510.10.3.2 For a single appliance having 
more than one draft hood outlet or flue 
collar, the manifold shall be constructed 
according to the instructions of the 
appliance manufacturer. Where there are no 
instructions, the manifold shall be designed 
and constructed in accordance with 
approved engineering practices. As an 
alternate method, the effective area of the 
manifold shall equal the combined area of 
the flue collars or draft hood outlets, and the 
vent connectors shall have a minimum 1 ft 
(0.3 m) rise. 

510.10.3.3 Where two or more gas 
appliances are connected to a common vent 
or chimney, each vent connector shall be 
sized in accordance with this chapter or 
other approved engineering methods. As an 
alternative method applicable only when all 
of the appliances are draft-hood-equipped, 
each vent connector shall have an effective 
area not less than the area of the draft hood 
outlet of the appliance to which it is connected. 

510.10.3.4 Where two or more gas 
appliances are vented through a common 
vent connector or vent manifold, the 
common vent connector or vent nianifold 
shall be located at the highest level 
consistent with available headroom and 
clearance to combustible material and 
shall be sized in accordance with this 
chapter or other approved engineering 
methods. 



56 



WATER HEATERS 



510.10 



As an alternate method applicable only 
where there are two draft-hood-equipped 
appliances, the effective area of the common 
vent connector or vent manifold and all 
junction fittings shall be not less than the 
area of the larger vent connector plus 50 
percent of the areas of smaller flue collar 
outlets. 

510.10.3.5 Where the size of a vent 
connector is increased to overcome 
installation limitations and obtain connector 
capacity equal to the equipment input, the 
size increase shall be made at the equipment 
draft hood outlet. 

510.10.4 Two or More Appliances Connected 
to a Single Vent. 

510.10.4.1 Where two or more vent 
connectors enter a common gas vent, 
chimney flue, or single-wall metal pipe, the 
smaller connector shall enter at the highest 
level consistent with the available headroom 
or clearance to combustible material. 

510.10.4.2 Vent connectors serving 
Category I appliances shall not be connected 
to any portion of a mechanical draft system 
operating under positive static pressure, 
such as those serving Category III or 
Category IV appliances. 

510.10.5 Clearance. Minimum clearances 
from vent connectors to combustible material 
shall be in accordance with Table 5-4. 

Exception: The clearance between a vent 
connector and combustible material shall be 
permitted to be reduced where the 
combustible material is protected as 
specified for vent connectors in Table 5-5. 

510.10.6 Avoid Unnecessary Bends. A vent 
connector shall be installed so as to avoid turns 
or other construction features that create 
excessive resistance to flow of vent gases. 

510.10.7 Joints. Joints between sections of 
connector piping and connections to flue collars 
or draft hood outlets shall be fastened in 
accordance with one of the following methods 

(1) By sheet metal screws. 

(2) Vent connectors of listed vent material shall 
be assembled and corinected to flue collars 
or draft hood outlets in accordance with the 
manufacturers' instructions. 

(3) Other approved means. 

510.10.8 Slope. A vent connector shall be 
installed without any dips or sags and shall 



slope upward toward the vent or chimney at 
least 1/4 in. /ft (20 mm/m). 

Exception: Vent connectors attached to a 
mechanical draft system installed in acxx)rdance 
with the manufacturers' instructions. 

510.10.9 Length of Vent Connector. 

510.10.9.1 A vent connector shall be as 
short as practical and the gas utilization 
equipment located as close as practical to 
the chimney or vent. 

510.10.9.2 Except as provided for in 
510.10.3, the maximum horizontal length of 
a single-wall connector shall be 7^ percent of 
the height of the chimney or vent. Except as 
provided for in 510.10.3, the maximum 
horizontal length of a Type B double-wall 
connector shall be 100 percent of the height 
of the chimney or vent. For a chimney or 
vent system serving multiple appliances, the 
maximuni length of an individual 
connector, from the appliance outlet to the 
junction with the common vent or another 
connector, shall be 100 percent of the height 
of the chimney or vent. 

510.10.10 Support. A vent connector shall be 
supported for the design and weight of the 
material employed to maintain clearances and 
prevent physical damage and separation of joints. 

510.10.11 Chimney Connection. Where 
entering a flue in a masonry or metal chimney, 
the vent connector shall be installed above the 
extreme bottom to avoid stoppage. Where a 
thimble or slip joint is used to facilitate removal 
of the connector, the connector shall be firmly 
attached to or inserted into the thimble or slip 
joint to prevent the connector from falling out. 
Means shall be employed to prevent the 
connector from entering so far as to restrict the 
space between its end and the opposite wall of 
the chimney flue. 

510.10.12 Inspection. The entire length of a 
vent connector shall be readily accessible for 
inspection, cleaning, and replacement. 

510.10.13 Fireplaces. A vent connector shall 
not be connected to a chimney flue serving a 
fireplace unless the fireplace flue opening is 
permanently sealed. 

510.10.14 Passage through Ceilings, Floors, 
or Walls. 

510.10.14.1 A vent connector shall not pass 
through any ceiling, floor, or fire-resistance 
rated wall. A single-wall metal pipe 



57 



510.10-510.12 



UNIFORM PLUMBING CODE 



connector shall not pass through any 
interior wall. 

Exception: Vent connectors made of 
listed Type B or Type L vent material 
and serving listed equipment with draft 
hoods and other equipment listed for 
use with Type B gas vents that pass 
through walls or partitions constructed 
of combustible material shall be 
installed with not less than the listed 
clearance to combustible material. 

510.10.14.2 A vent connector made of a 
single-wall metal pipe shall not pass 
through a combustible exterior wall unless 
guarded at the point of passage by a 
ventilated metal thimble not smaller than 
the following: 

(1) For listed appliances equipped with 
draft hoods and appliances listed for 
use with Type B gas vents, the thim- 
ble shall be a minimum of 4 in. (100 
mm) larger in diameter than the vent 
connector. Where there is a run of not 
less than 6 ft (1.8 m) of vent connector in 
the opening between the draft hood 
outlet and the thimble, the thimble shall 
be a mininium of 2 in. (50 mm) larger in 
diameter than the vent connector. 

(2) For unlisted appliances having draft 
hoods, the thimble shall be a minimum 
of 6 in. (150 mm) larger in diameter than 
the vent connector. 

(3) For residential and low-heat appliances, 
the thimble shall be a minimum of 12 in. 
(300 mm) larger in diameter than 
the vent connector. 

Exception: In lieu of thimble 
protection, all combustible material 
in the wall shall be removed from 
the vent connector a sufficient 
distance to provide the specified 
clearance from such vent connector 
to combustible material. Any 
material used to close up such 
opening shall be noncombustible. 

510.10.14.3 Vent connectors for medium- 
heat equipment shall not pass through walls 
or partitions constructed of combustible 
material. [NFPA 54:10.10.14.3] 

510.11 Vent Connectors for Category II, 
Category III, and Category IV Gas Utilization 
Equipment. (See Section 510.4.) [NFPA 54:10.11] 



510.12 Draft Hoods and Draft Controls. 

510.12.1 Equipment Requiring Draft 
Hoods. Vented gas utilization equipment 
shall be installed with draft hoods. 

Exception: Dual oven-type combination 
ranges, incinerators, direct-vent 
equipment, fan-assisted combustion 
system appliances, equipment requiring 
chimney draft for operation, single 
firebox boilers equipped with 
conversion burners with inputs greater 
than 400,000 Btu/h (117 kW), equipment 
equipped with blast, power, or pressure 
burners that are not listed for use with 
draft hoods, and equipment designed 
for forced venting. 

510.12.2 Installation. A draft hood supplied 
with or forming a part of listed vented gas 
utilization equipment shall be installed 
without alteration, exactly as furnished and 
specified by the equipment manufacturer. If 
a draft hood is not supplied by the equipment 
manufacturer where one is required, a draft 
hood shall be installed, be of a listed or 
approved types, and, in the absence of other 
instructions, be of the same size as the 
equipment flue collar. Where a draft hood is 
required with a conversion burner, it shall 
be of a listed or approved type. Where it is 
determined that a draft hood of special 
design is needed or preferable for a 
particular installation, the installation shall 
be in accordance with the recommendations 
of the equipment manufacturer and shall be 
with the approval of the Authority Having 
Jurisdiction. 

510.12.3 Draft-Control Devices. Where a 
draft control device is part of the gas 
utilization equipment or is supplied by the 
equipment manufacturer, it shall be installed 
in accordance with the manufacturer's 
instructions. In the absence of manufacturer's 
instructions, the device shall be attached to 
the flue collar of the equipment or as near to 
the equipment as practical. 

510.12.4 Additional Devices. Gas utilization 
equipnient (except incinerators) requiring 
controlled chimney draft shall be permitted 
to be equipped with a listed double-acting 
barometric draft regulator installed and 
adjusted in accordance with the manufacturers' 
instructions. 

510.12.5 Location. Draft hoods and 
barometric draft regulators shall be installed 



58 



WATER HEATERS 



510.12-511.1 



in the same room or enclosure as the 
equipment in such a marmer as to prevent 
any difference in pressure between the hood 
or regulator and the combustion air supply. 

510.12.6 Positioning. Draft hoods and 
draft regulators shall be installed in the 
position for which they were designed 
with reference to the horizontal and 
vertical planes and shall be located so that 
the relief opening is not obstructed by any 
part of the equipment^ or adjacent 
construction. The equipment and its draft 
hood shall be located' so that the relief 
opening is accessible for checking vent 
operation. 

510.12.7 Clearance. A draft hood shall be 
located so that its relief opening is not less 
than 6 in. (150 mm) from any surface 
except that of the equipment it serves and 
the venting system to which the draft 
hood is connected. Where a greater or 
lesser clearance is indicated on the 
equipment label, the clearance shall not be 
less than that specified on the label. Such 
clearances shall not be reduced. [NFPA 
54:10.12.7] 

510.13 l\/lanualiy Operated Dampers. A 

manually operated damper shall not be placed 
in any equipment vent connector. Fixed baffles 
shall not be classified as manually operated 
dampers. [NFPA 54:10.13] 

510.14 Automatically Operated Vent Dampers. 

An automatically operated vent damper shall 
be of a listed type. [NFPA 54:10.14] 

510.15 Obstructions. Devices that retard the 
flow of vent gases shall not be installed in a vent 
cormector, chimney, or vent. The following shall 
not be considered as obstructions: 

(1) Draft regulators and safety controls 
specifically listed for installation in venting 
systems and installed in accordance with the 
terms of their listing. 

(2) Approved draft regulators and safety 
controls designed and installed in 
accordance with approved engineering 
methods. 

(3) Listed heat reclaimers and automatically 
operated vent dampers installed in 
accordance with the terms of their listing. 

(4) Vent dampers serving listed appliances 
installed in accor-dance with this chapter or 
other approved engineering methods. 



(5) Approved economizers, heat reclaimers, 
and recuperators installed in venting 
systems of equipment not required to be 
equipped with draft hoods, provided the 
gas utilization equipment manufacturer's 
instructions cover the installation of such a 
device in the venting system and 
performance in accordance with 510.3.1 and 
510.3.2 is obtained. [NFPA 54:10.15(b)] 

511.0 Sizing of Category I Venting Systems. 

511.1 Obstructions and Vent Dampers. These 
venting tables shall not be used where obstructions 
(see Section 510.15) are installed in the venting 
system. The installation of vents serving listed 
appliances with vent dampers shall be in accordance 
with the appliance manufacturer's instructions or in 
accordance with the following: 

(1) The maximum capacity of the vent system shall 
be determined using the NAT MAX column. 

(2) The maximum capacity shall be determined as if 
the appliance were a fan-assisted appliance, 
using the FAN MIN column to determine the 
minimum capacity of the vent system. Where 
the corresponding FAN MIN is NA, the vent 
configuration shall not be permitted and an 
alternative venting configuration shall be utilized. 

511.1.1 Where the vent size determined from 
the tables is smaller than the appliance draft 
hood outlet or flue collar, the use of the smaller 
size shall be permitted provided that the 
installation complies with all of the following 
requirements: 

(1) The total vent height (H) is at least 10 ft (3 m). 

(2) Vents for appliance draft hood outlets or flue 
collars 12 in. (300 mm) in diameter or 
smaller are not reduced more than one table 
size. 

(3) Vents for appliance draft hood outlets or flue 
collars larger than 12 in. (300 mm) in 
diameter are not reduced more than two 
table sizes. 

(4) The maximum capacity listed in the tables 
for a fan-assist-ed appliance is reduced by 
10 percent (0.90 maximum table capacity). 

(5) The draft hood outlet is greater than 4 in. 
(100 mm) in diameter. Do not cormect a 3 in. 
(80mm) diameter vent to a 4 in. (100mm) 
diameter draft hood outlet. This provision 
shall not apply to fan-assisted appliances. 

511.1.2 Single-appliance venting configurations 
with zero (0) lateral lengths in Tables 5-9, 5-10, 
and 5-13 shall have no elbows in the venting 
system. For vent configurations with lateral 



59 



511.1 -511.2 



UNIFORM PLUMBING CODE 



lengths, the venting tables include allowance for 
two 90 degree turns. For each additional elbow up 
to and including 45 degrees, the maximum capacity 
listed in the venting tables shall be reduced by 5 
percent. For each elbow greater than 45 degrees 
up to and including 90 degrees, the maximum 
capacity listed in the venting tables shall be 
reduced by 10 percent. 

51 1 .1 .3 Zero (0) lateral (L) shall apply only to a 
straight vertical vent attached to a top outlet 
draft hood or flue collar. 

511.1.4 Sea level input ratings shall be used 
when determining maximum capacity for high- 
altitude installation. Actual input (derated for 
altitude) shall be used for determining minimum 
capacity for high-altitude installation. 

511.1.5 For appliances with more than one 
input rate, the minimum vent capacity (FAN 
Min) determined from the tables shall be less 
than the lowest appliance input rating, and the 
maximum vent capacity (FAN Max /NAT Max) 
determined from the tables shall be greater than 
the highest appliance rating input. 

511.1.6 Listed corrugated metallic chimney 
liner systems in masonry chimneys shall be 
sized by using Table 5-9 or 5-10 for Type B vents 
with the maximuni capacity reduced by 20 percent 
(0.80 maximum capacity) and the minimum 
capacity as shown in Table 5-9 or 5-10. 
Corrugated metallic liner systems installed with 
bends or offsets shall have their maximum 
capacity further reduced in accordance with 
511.1.2. The 20 percent reduction for corrugated 
metallic chimney liner systems includes an 
allowance for one long radius 90 degree turn at 
the bottom of the liner. 

511.1.7 Where the vertical vent has a larger 
diameter than the vent connector, the vertical 
vent diameter shall be used to determine the 
minimum vent capacity, and the connector 
diameter shall be used to determine the 
maximum vent capacity. The flow area of the 
vertical vent shall not exceed seven times the 
flow area of the listed appliance categorized vent 
area, flue collar area, or draft hood outlet area 
unless designed in accordance with approved 
engineering methods. 

51 1 .1 .8 Tables 5-9 through 5-13 shall be used for 
chimneys and vents not exposed to the outdoors 
below the roof line. A Type B vent or listed 
chimney lining system passing through an 
unused masonry chimney flue shall not be 
considered to be exposed to the outdoors. Table 
5-11 in combination with Table 5-19 shall be 



used for clay-tile-lined exterior masonry 
chimneys, provided all of the following are met: 

(1) The vent connector is Type B double wall. 

(2) The vent connector length is limited to 1-1/2 ft 
for each inch (180 mm /mm) of vent cormector 
diameter. 

(3) The appliance is draft hoodequipped. 

(4) The input rating is less than the maximum 
capacity given in Table 5-11. 

(5) For a water heater, the outdoor design 
temperature shall not be less than 5°F (15°C). 

(6) For a space-heating appliance, the input 
rating is greater than the minimum capacity 
given by Table 5-19. 

Exception: Vents serving listed appliances 
installed in accordance with the appliance 
instructions and the terms of the listing. 

51 1 .1 .9 Corrugated vent connectors shall not be 
smaller than the listed appliance categorized 
vent diameter, flue collar diameter, or draft 
hood outlet diameter. 

511.1.10 Vent connectors shall not be upsized 
more than two sizes greater than the listed 
appliance categorized vent diameter, flue collar 
diameter, or draft hood outlet diameter. 

511.1.11 In a single run of vent or vent 
connector, more than one diameter and type 
shall be permitted to be used, provided that all 
the sizes and types are permitted by the tables. 

511.1.12 Interpolation shall be permitted in 
calculating capacities for vent dimensions that 
fall between table entries. (See Part II-Example 
G.1.3.) 

51 1.1.13 Extrapolation beyond the table entries 
shall not be permitted. 

511.1.14 For vent heights lower than 6 ft and 
higher than shown in the tables, engineering 
methods shall be used to calculate vent capacities. 

511.2 Additional Requirements to l\/lultiple 
Appliance Vent Table 5-14 through Table 5-21 (a) 
and Table 5-21 (b). 

511.2.1 Obstructions and Vent Damper. 

These venting tables shall not be used where 
obstructions (see Section 510.15) are installed 
in the venting system. The installation of vents 
serving listed appliances with vent dampers 
shall be in accordance with the appliance 
manufacturer's instructions or in accordance 
with the following: 

(1) The maximum capacity of the vent connector 
shall be determined using the NAT Max 
column. 

(2) The maximum capacity of the vertical vent 



60 



WATER HEATERS 



511.2 



or chimney shall be determined using the 
FAN + NAT column when the second 
appliance is a fan-assisted appliance, or the 
NAT + NAT column when the second 
appliance is equipped with a draft hood. 

(3) The minimum capacity shall be determined 
as if the appliance were a fan-assisted appliance. 

(a) The minimum capacity of the vent 
connector shall be determined using the 
FAN Min column. 

(b) The FAN + FAN column shall be used 
when the second appliance is a fan- 
assisted appliance, and the FAN + NAT 
column shall be used when the second 
appliance is equipped with a draft 
hood, to determine whether the vertical 
vent or chimney configuration is not 
permitted (NA). Where the vent 
configuration is N A, the vent configuration 
shall not be permitted and an alter- 
native venting configuration shall be 
utilized. 

51 1 .2.2 The maximum vent cormector horizontal 
length shall be 18 in. /in. (180 mm/mm) of 
connector diameter as shown in Table 5-8: 

TABLE 5-8 
Vent Connector Maximum Length 



Connector Diameter 


Connector Horizontal 


Maximum (in.) 


Length (ft.) 


3 


4-1/2 


4 


6 


5 


7-1/2 


6 


9 


7 


10-1/2 


8 


12 


9 


13-1/2 


10 


15 


12 


18 


14 


21 


16 


24 


18 


27 


20 


30 


22 


33 


24 


36 



For SI units, 1 in. = 25.4 mm; 1 ft = 0.305 m. 
[NFPA 54 Table 13.2.2] 



51 1 .2.3 The vent connector shall be routed to 
the vent utilizing the shortest possible route. 
Connectors with longer horizontal lengths than 
those listed in Table 5-8 are permitted under the 
following conditions: 

(A) The maximum capacity (FAN Max or NAT 
Max) of the vent connector shall be reduced 
10 percent for each additional multiple of 
the length listed in Table 5-8. For example, 
the maximum length listed for a 4 in. (100 
mm) connector is 6 ft (1.8 m). With a 
connector length greater than 6 ft (1.8 m) but 
not exceeding 12 ft (3.7 m), the maximum 
capacity must be reduced by 10 percent 
(0.90 maximum vent connector capacity). 
With a connector length greater than 12 ft 
(3.7 m) but not exceeding 18 ft (5.5 m), the 
maximum capacity must be reduced by 20 
percent (0.80 maximum vent capacity). 

(B) For a connector serving a fan-assisted 
appliance, the minimum capacity (FAN 
Min) of the connector shall be determined 
by referring to the corresponding single 
appliance table. For Type B double-wall 
connectors. Table 5-9 shall be used. For 
single- wall connectors. Table 5-10 shall be 
used. The height (H) and lateral (L) shall be 
measured according to the procedures for a 
single appliance vent, as if the other 
appliances were not present. 

511.2.4 Where the vent connectors are 
combined prior to entering the vertical portion 
of the common vent to form a common vent 
manifold, the size of the conimon vent 
manifold and the common vent shall be 
determined by applying a 10 percent reduction 
(.90 x maximum common vent capacity) to the 
Common Vent Capacity part of the comm^on 
vent tables. The length of the common vent 
connector manifold (LM) shall not exceed 18 
in. /in. (180 mm/mm) of common vent 
connector manifold diameter (D). (See Part II- 
Figure G.l(k).) 

511.2.5 Where the common vertical vent is 
offset, the maximum capacity of the common 
vent shall be reduced in accordance with 511.2.6 
and the horizontal length of the common vent 
offset shall not exceed 18 in. /in. (180 mm/nini) 
of common vent diameter. 

511.2.6 For each elbow up to and including 45 
degrees in the common vent, the maximum 
common vent capacity listed in the venting 
tables shall be reduced by 5 percent. For 
each elbow greater than 45 degrees up to and 
including 90 degrees, the maximum common 



61 



511.2 



UNIFORM PLUMBING CODE 



vent capacity listed in the venting tables shall be 
reduced by 10 percent. 

511.2.7 The vent connector capacities listed 
in the common vent sizing tables include 
allowance for two 90 degree elbows. For each 
additional elbow up to and including 45 
degrees, the maximum vent connector 
capacity listed in the venting tables shall be 
reduced by 5 percent. For each elbow greater 
than 45 degrees up to and including 90 
degrees, the maximum vent connector 
capacity listed in the venting tables shall be 
reduced by 10 percent. 

51 1 .2.8 At the point where tee or wye fittings 
connect to a common vent, the opening size of 
the fitting shall be equal to the size of the 
common vent. Such fittings shall not be 
prohibited from having reduced size openings at 
the point of connection of appliance vent 
connectors. 

511.2.9 Sea level input ratings shall be used 
when determining maximum capacity for high- 
altitude installation. Actual input (derated for 
altitude) shall be used for determining minimum 
capacity for high-altitude installation. 

511.2.10 The connector rise (R) for each 
appliance connector shall be measured from the 
draft hood outlet or flue collar to the centerline 
where the vent gas streams come together. 

511.2.11 For multiple units of gas utilization 
equipment all located on one floor, available 
total height (H) shall be measured from the 
highest draft hood outlet or flue collar up to the 
level of the outlet of the common vent. 

511.2.12 For multistory installations, available 
total height (H) for each segment of the system 
shall be the vertical distance between the highest 
draft hood outlet or flue collar entering that 
segment and the centerline of the next higher 
interconnection tee. (See Part II-Figure G.l(j).) 

51 1 .2.1 3 The size of the lowest connector and of 
the vertical vent leading to the lowest 
interconnection of a multistory system shall be 
in accordance with Table 5-9 or 5-10 for available 
total height (H) up to the lowest interconnection. 
(See Part II-Figure G.l(n).) 

511.2.14 Where used in multistory systems, 
vertical common vents shall be Type B double- 
wall and shall be installed with a listed vent cap. 

511.2.15 Offsets in multistory common vent 
systems shall be limited to a single offset in each 
system, and systems with an offset shall comply 
with all of the following: 



(1) The offset angle shall not exceed 45 degrees 
from vertical. 

(2) The horizontal length of the offset shall not 
exceed 18 inches for each inch (180 mm / mm) 
of common vent diameter of the segment in 
which the offset is located. 

(3) For the segment of the common vertical vent 
containing the offset, the common vent 
capacity listed in the common venting tables 
shall be reduced by 20 percent (0.80 x maximum 
common vent capacity). 

(4) A multistory common vent shall not be 
reduced in size above the offset. 

511.2.16 Where two or more appliances are 
connected to a vertical vent or chimney, the flow 
area of the largest section of vertical vent or 
chimney shall not exceed seven times the 
smallest listed appliance categorized vent areas, 
flue collar area, or draft hood outlet area unless 
designed in accordance with approved 
engineering methods. 

511.2.17 For appliances with more than one 
input rate, the minimum vent connector capacity 
(FAN Min) determined from the tables shall be 
less than the lowest appliance input rating, and 
the maximum vent connector capacity (FAN 
Max or NAT Max) determined from the table 
shall be greater than the highest appliance input 
rating. 

511.2.18 Listed corrugated metallic chimney 
liner systems in masonry chimneys shall be 
sized by using Table 5-14 or 5-15 for Type B 
vents, with the maximum capacity reduced by 
20 percent (0.80 maximum capacity) and the 
minimum capacity as shown in Table 5-14 or 
5-15. Corrugated metallic liner systems 
installed with bends or offsets shall have their 
maxin\um capacity further reduced in accordance 
with 511.2.5 and 511.2.6. The 20% reduction 
for corrugated metallic chimney liner systems 
includes an allowance for one long radius 90 
degree turn at the bottom of the liner. 

511.2.19 Tables 5-14 through 5-18 shall be used 
for chimneys and vents not exposed to the 
outdoors below the roof line. A Type B vent or 
listed chimney lining system passing through an 
unused masonry chimney flue shall not be 
considered to be exposed to the outdoors. Tables 
5-20 and 5-21 shall be used for clay-tile-lined 
exterior masonry chimneys, provided all of the 
following conditions are met: 

(1) Vent connector is Type B double-wall. 

(2) At least one appliance is draft-hood-equipped. 



62 



WATER HEATERS 



511.2- 



(3) The combined appliance input rating is less 
than the maximum capacity given by Table 
5-20(a) (for NAT + NAT) or Table 5-21 (a) 
(for FAN + NAT). 

(4) The input rating of each space-heating 
appliance is greater than the minimum 
input rating given by Table 5-20(b) (for 
NAT + NAT) or Table 5-21(a) (for FAN + NAT). 

(5) The vent connector sizing is in accordance 
with Table 5-16. Where these conditions 
carmot be met, an alternative venting design 
shall be used, such as a listed chimney 
lining system. 

Exception: Vents serving listed appliances 
installed in accordance with the appliance 
manufacturer's instructions and the terms 
of the listing. 

51 1 .2.20 Vent connectors shall not be increased 
more than two sizes greater than the listed 
appliance categorized vent diameter, flue collar 
diameter, or draft hood outlet diameter. Vent 
connectors for draft-hood-equipped appliances 
shall not be smaller than the draft hood outlet 
diameter. Where vent connector sizes determined 
from the tables for fan-assisted appliances are 
smaller than the flue collar diameter, the use of 
the smaller sizes shall be permitted provided 
that the installation complies with all of the 
following conditions: 

(1) Vent connectors for fan-assisted appliance 
flue collars 12 in. (300 mm) in diameter or 
smaller are not reduced by more than one 
table size [e.g., 12 in. to 10 in. (300 mm 
to 250 mm) is a one-size reduction] and 
those larger than 12 in. (300 mm) in 
diameter are not reduced more than two 
table sizes [e.g., 24 in. to 20 in. (610 mm to 
510 mm) is a two-size reduction]. 

(2) Fan-assisted appliances are common vented 
with a draft-hood-equipped appliance. 

(3) The vent connector has a smooth interior 
wall. 

511.2.21 All combinations of pipe sizes, 
single-wall, and double-wall metal pipe shall 
be allowed within any connector runs or 
within the common vent, provided ALL of 
the appropriate tables permit ALL of the 
desired sizes and types of pipe, as if they 
were used for the entire length of the subject 
connector or vent. Where single-wall and 
Type B double-wall metal pipes are used for 
vent connectors within the same venting 
system, the common vent must be sized 



using Table 5-15 or 5-17 as appropriate. 

51 1 .2.22 Where a table permits more than one 
diameter of pipe to be used for a connector or 
vent, all the permitted sizes shall be permitted to 
be used. 

511.2.23 Interpolation shall be permitted in 
calculating capacities for vent dimensions that 
fall between table entries. (See Part II Annex G.1.3.) 

51 1 .2.24 Extrapolation beyond the table entries 
shall not be permitted. 

51 1 .2.25 For vent heights lower than 6 ft and 
higher than shown in the tables, engineering 
methods shall be used to calculate vent capacities. 

512.0 Direct- Vent Equipment. Listed direct-vent 
gas utilization equipment shall be considered 
properly vented where installed in accordance with 
the terms of its listing, the manufacturers' 
instructions, and Section 510.8.3. 



Chimney or §m want 




TZL 



, !j„ . ! . i , !j ! i I x 



FIGURE 5-8 All Combustion Air from Indoor 
Spaces through Indoor Combustion Air 
Openings. 



63 



Figure 5-9 - Figure 5-12 



UNIFORIVI PLUIVIBING CODE 



air Inlet- 



dhlmnsy or gas vBti^ 



Ventilation louvem 
(ead^ end of attic) 




CHImr^y or gas vprit 



• Vemitetlofi louvers for 
unheated aa\^ &p&c^ 




FIGURE 5-9 All Combustion Air from Outdoors - 
Inlet Air from Ventilated Crawl Space and Outlet 
Air to Ventilated Attic. 



FIGURE 5-11 All Combustion Air from Outdoors 
through Horizontal Ducts. 



Veniatlontotivers 
(each and of attic) 




inidtalfdi^ 



3 



'. ^ i .'. ' . i 



•ehlnWey or gas vpnt 



III) 




FIGURE 5-10 All Combustion Air from Outdoors 
through Ventilated Attic. 



FIGURE 5-12 All Combustion Air from Outdoors 
through Single Combustion Air Opening. 



64 



WATER HEATERS 




Direct vent terminal cieaiance 
Minimum dearance, C 
Input (Bbji/hr) Ct&amnc^ (In.) 

10.000 or less 

10.001 to 50,000 9 
OverSO.CKK) 12 
(see 10.8.3) 

For SI units: 1 ft = 0.305 m; 1 in. = 25.4 mm; 
IBtu/hrs 0.203 W 



Fomedair 
inlet 



FIGURE 5-13 Exit Terminals of l\/lechanical Draft and Direct- Vent Venting Systems. 




37T 
(2°C) 



99% Winter Design Temperatures for the Contiguous United States 

This map is a necessarily generalized guide to temperatures in the contiguous United States. Temperatures shown for areas 
such as mountainous regions and large urban centers may not be accurate. The data used to develop this map are from the 
1 993 ASHRAE Handbook— Fundamentals (Chapter 24, Table 1 : Climate Conditions for the United States). 
For 99% winter design temperatures in Alaska, consult the ASHRAE Handbook — Fundamentals. 
99% winter design temperatures for (Hawaii are greater than 37°F. 

FIGURE 5-14 Range of Winter Design Temperatures Used in Analyzing Exterior Masonry Chimneys in 
the United States. 



65 



Table 5-9 



UNIFORM PLUMBING CODE 



Table 5-9 Type B Double-Wall Gas Vent 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: Connected Directly to Vent 



Single 



Category I 



Vent Diameter — D (in.) 





Lateral 




3 


1 


4 


1 


5 


1 


6 






7 




8 






9 




Height 










Appl] 


ance 


Input Rating in 


rhousands of Btu per 


Hour 












H 


L 

(ft.) 


FAN 


NAl 
Max 


FAN NAT 
Min Max Max 


FAN -NAl 
Min Max pVlax 


FAN NAT 
Min Max Max 


FAN NA.T 
Min Max Max 


FAN 
Min Max 


NAT 
Max 


FAN 
Min Max 


NAT 


(ft.) 


Vlin 


Max 


Max 


6 








78 


46 





152 


86 





251 


il4I 





375 


205 





524 285 





698 


370 





897 


470 




2 


13 


51 


36 


18 


97 


67 


27 


157 


;i05 


32 


232 


157 


44 


321 217 


53 


425 


285 


63 


543 


370 




4 


21 


49 


34 


30 


94 


64 


39 


153 


'103 


50 


227 


153 


66 


316 -211 


79 


419 


279 


93 


536 


362 




6 


25 


46 


.32 


36 


91 


hi 


47 


149 


:100 


59 


223 


144 


78 


310 205 


93 


413 


273 


110 


530 


354 


8 








84 


50 





165 


94 





276 


^155 





415 


235 





583 '320 





780 


415 





1006 


537 




2 


12 


57 


41) 


16 


109 


75 


25 


178 


,120 


28 


263 


180 


42 


365 '247 


50 


483 


322 


60 


619 


418 




5 


23 


53 


38 


32 


103 


71 


42 


171 


;113 


53 


255 


173 


70 


356 237 


83 


473 


313 


99 


607 


407 




8 


28 


49 


35 


39 


98 


66 


51 


164 


;i09 


64 


247 


165 


84 


347 .227 


99 


463 


303 


117 


596 


396 


10 








88 


53 





175 


100 





295 


I6h 





447 


235 





631 345 





847 


450 





1096 


585 




2 


12 


61 


42 


17 


118 


SI 


23 


194 


j.l2y 


26 


289 


195 


40 


402 273 


48 


533 


355 


57 


684 


457 




5 


23 


57 


40 


32 


113 


77 


41 


187 


,124 


52 


280 


188 


68 


392 -263 


81 


522 


346 


95 


671 


446 




10 


30 


51 


36 


41 


104 


70 


54 


176 


115 


67 


267 


175 


88 


376 -245 


104 


504 


330 


122 


651 


427 


15 








94 


3S 





191 


112 





327 


187 





502 


285 





716 390 





970 


52=1 





1263 


682 




2 


11 


69 


48 


15 


136 


93 


20 


226 


:I50 


22 


339 


225 


38 


475 >316 


45 


633 


414 


53 


815 


544 




5 


22 


65 


45 


30 


130 


87 


39 


219 


■142 


49 


330 


217 


64 


463 300 


76 


620 


403 


90 


800 


529 




10 


29 


59 


41 


40 


121 


a: 


51 


206 


1115 


64 


315 


208 


84 


445 288 


99 


600 


386 


116 


777 


507 




15 


35 


53 


37 


48 


112 


76 


61 


195 


1128 


76 


301 


198 


98 


429 ,275 


115 


580 


373 


134 


755 


491 


20 








97 


61 





202 


119 





349 


[202 





540 


3(F 





776 430 





1057 


573 





1384 


752 




2 


10 


75 


51 


14 


149 


100 


18 


250 


'.]hb 


20 


377 


249 


33 


531 346 


41 


711 


470 


50 


917 


612 




5 


21 


71 


4S 


29 


143 


96 


38 


242 


1160 


47 


367 


241 


62 


519 ,337 


73 


697 


460 


86 


902 


599 




10 


28 


64 


44 


38 


133 


8') 


50 


229 


;i5o 


62 


351 


228 


81 


499 ;321 


95 


675 


443 


112 


877 


576 




15 


34 


58 


40 


46 


124 


84 


59 


217 


142 


73 


337 


217 


94 


481 30S 


111 


654 


427 


129 


853 


557 




20 


48 


52 


35 


55 


116 


78 


69 


206 


■134 


84 


322 


206 


107 


464 295 


125 


634 


410 


145 


830 


537 


30 








ion 


64 





213 


128 





374 


;220 





587 


336 





853 473 





1173 


650 





1548 


855 




2 


9 


,S| 


5b 


13 


166 


112 


14 


283 


1185 


18 


432 


280 


27 


613 -344 


33 


826 


5'i5 


42 


1072 


700 




5 


21 


/ / 


54 


28 


160 


108 


36 


275 


il7b 


45 


421 


273 


58 


600 ;385 


69 


811 


524 


82 


1055 


688 




10 


27 


70 


50 


37 


150 


102 


48 


262 


|171 


59 


405 


261 


77 


580 -371 


91 


788 


507 


107 


1028 


668 




15 


33 


fi4 


NA 


44 


141 


96 


57 


249 


1.163 


70 


389 


24'-) 


90 


560 357 


105 


765 


490 


124 


1002 


648 




20 


56 


58 


\A 


53 


132 


90 


66 


237 


;i54 


80 


374 


237 


102 


542 343 


119 


743 


473 


139 


977 


h28 




30 


NA 


NA 


67 


73 


113 


\A 


88 


214 


[SA 
;232 


104 


346 


219 


131 


507 :321 


149 


702 


444 
70S 


171 


929 


594 


50 








101 





216 


134 





397 





633 


363 





932 ,518 





1297 





1730 


952 




2 


8 


86 


61 


11 


183 


122 


14 


320 


1206 


15 


497 


314 


22 


715 ,445 


26 


975 


615 


33 


1276 


81? 




5 


20 


82 


NA 


27 


177 


119 


35 


312 


200 


43 


487 


308 


55 


702 438 


65 


960 


605 


77 


1259 


798 




10 


26 


76 


NA 


35 


168 


114 


45 


299 


190 


56 


471 


298 


73 


681 -426 


86 


935 


589 


101 


1230 


773 




15 


59 


70 


NA 


42 


158 


NA 


54 


287 


fl80 


66 


455 


288 


85 


662 '413 


100 


911 


572 


117 


1203 


747 




20 


NA 


NA 


NA 


50 


149 


\A 


63 


275 


;169 


76 


440 


278 


97 


642 =401 


113 


888 


55(5 


131 


1176 


722 




30 


NA 


NA 


\A 


69 


131 


NA 


84 


250 


.NA 


99 


410 


259 


123 


605 '376 


141 


844 


522 


161 


1125 


(vO 


100 





NA 


NA 


\A 





218 


\A 





407 


i\'A 





665 


400 





997 560 





1411 


770 





1908 


1040 




2 


NA 


NA 


\A 


10 


194 


\A 


12 


354 


NA 


13 


566 


375 


18 


831 -510 


21 


1155 


700 


25 


1536 


935 




5 


NA 


NA 


\A 


26 


189 


NA 


33 


347 


NA 


40 


557 


369 


52 


820 =.504 


60 


1141 


692 


71 


1519 


926 




10 


NA 


NA 


NA 


33 


182 


NA 


43 


335 


^NA 


53 


542 


361 


68 


801 ;493 


80 


1118 


679 


94 


1492 


910 




15 


NA 


NA 


NA 


40 


174 


NA 


50 


321 


NA 


62 


528 


353 


80 


782 :482 


93 


1095 


666 


109 


1465 


895 




20 


NA 


NA 


\A 


47 


166 


NA 


59 


311 


■NA 


71 


513 


344 


90 


763 ;471 


105 


1073 


653 


122 


1438 


880 1 




30 


NA 


NA 


NA 


NA 


NA 


NA 


78 


290 


;NA 


92 


483 


NA 


115 


726 :449 


131 


1029 


627 


149 


1387 


849 




50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


IN A 


147 


428 


NA 


180 


651 -405 


197 


944 


575 


217 


1288 


787 1 



66 



WATER HEATERS 



Table 5-9 



Table 5-9 Continued 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: 



Single 



Category I 



Connected Directly to Vent 



















Vent Diameter — 


D (in.) 
















Lateral 


10 1'' 


izl 




If, 




18 






20 






7? 




24 


Heigh 








Appliance 


[nput Rating 


in Thousands 


ofB 


•tu per He 


)ur 








H 


L 
(ft.) 


FAN T^^T 


FAN 


NAT 
Max 


FAN 


NAT 
Vtaj. 


FAN 
Min Max 


NAr 

Max 


FAN 
Min Max 


NAT 
Max 


FAN 
Min Max 


NAT 
Mav 


FAN 
Min Max 


NAT 
Max 


FAN IVAT 


(ft.) 


MinMax Max 


MinMax 


MinMax 


Min Max Max 


6 





1121 57Q 


1645 


S30 


2267 


1170 





2983 


1531) 


3802 


14o0 


1) 


4721 


2430 


II 


5737 


2950 


6853 3520 




2 


75 675 Am 


103 982 


p5(I 


138 1346 


890 


178 


1769 


1170 


225 2250 


1480 


2^16 


2782 


1850 


3d() 


3377 


2220 


426 4030 2670 




4 


110 668 445 


147 975 


h40 


191 1338 


880 


242 


1761 


1160 


300 2242 


1475 


3ij() 


2774 


1835 


4f.9 


3370 


2215 


555 4023 2660 




6 


128 661 mS 


171 967 


630 


219 1330 


870 


276 


1753 


1150 


341 2235 


1470 


4^>7 


2767 


1820 


=123 


3363 


2210 


618 4017 2t>5li 


8 





1261 «60, 


1858 


970 


2571 


n2i) 





3399 


1740 


4333 


2220 





5387 


27511 


(1 


6555 


3360 


7838 4011) 




2 


71 770 515 


98 1124 


745 


130 1543 


1020 


168 


2030 


1340 


212 2584 


1700 


278 


3196 


2110 


V,6 


3882 


2560 


401 4634 3050 




5 


115 758 S05 


1541110 


733 


199 1528 


1010 


251 


2013 


1330 


311 2563 


1685 


39,S 


3180 


2090 


476 


3863 


2545 


562 4612 3040 




8 


137 746 490 


180 1097 


720 


231 1514 


1000 


289 


2000 


1?20 


354 2552 


1670 


450 


3163 


2070 


^37 


3850 


2530 


630 4602 ,'.030 


10 





1377 720 


2036 


IOpO 


2825 


1450 





3742 


1«25 


4782 


2450 





5955 


3050 





7254 


3710 


8682 4450 




2 


68 852 5m 


93 1244 


8^0 


124 1713 


1130 


161 


2256 


1480 


202 2868 


1890 


264 


3556 


2 MO 


319 


4322 


2840 


378 5153 3391) 




5 


112 839 547 


149 1229 


829 


192 1696 


1 105 


243 


2238 


1461 


300 2849 


1871 


3S2 


3536 


2318 


458 


4301 


2S1S 


540 5132 3371 




10 


142 817 S25 


1871204 


7^5 


238 1669 


1080 


298 


2209 


1430 


364 2818 


1840 


4=i9 


3504 


2280 


546 


4268 


27K0 


641 5099 3340 


15 





1596 640 


2380 


I2't0 


3323 


1720 





4423 


2270 


5678 


29(11) 


1) 


7099 


3620 





8665 


4410 


10393 5300 




2 


63 1019 675, 


86 1495 


985 


114 2062 


1350 


147 


2719 


1770 


186 3467 


2260 


23') 


4304 


2800 


2')0 


5232 


3410 


346 6251 4080 




5 


105 1003 .m) 


1401476 


%7 


182 2041 


n27 


229 


2696 


17-JS 


283 3442 


2235 


^^-5 


4278 


2777 


426 


5204 


338=; 


501 6222 41157 




10 


135 977 mS. 


1771446 


»y^ 


227 2009 


1289 


283 


2659 


1712 


346 3402 


2101 


4^2 


4234 


2739 


510 


5159 


3343 


599 6175 4019 




15 


155 953 mo 


2021418 


M{)5 


257 1976 


1250 


318 


2623 


1675 


385 3363 


2150 


479 


4192 


2700 


ih4 


5115 


33fi0 


665 6129 3980 


20 





1756 ^0 


2637 


1350 


3701 


1900 





4948 


2520 


6376 


325(1 





7988 


4060 


11 


9785 


44«0 


11753 6000 




2 


59 1150 755 


81 1694 


3100 


107 2343 


1520 


139 


3097 


2000 


175 3955 


2570 


220 


4916 


3200 


2(1'-) 


5983 


3910 


321 7154 4700 




5 


101 1133 7m 


1351674 


1079 


174 2320 


1498 


219 


3071 


1978 


270 3926 


2544 


3^7 


4885 


3174 


403 


5950 


3880 


475 7119 4hn2 




10 


130 1105 710 


172 1641 


U)45 


220 2282 


1460 


273 


3029 


1940 


334 3880 


2500 


413 


4835 


3130 


4S') 


5896 


3S30 


573 7063 4600 




15 


150 1078 m$ 


195 1609 


in IS 


248 2245 


1425 


306 


2988 


1910 


372 3835 


246=; 


4^<-> 


4786 


3090 


=^41 


5844 


^795 


631 7007 '457=; 




20 


167 1052 6^. 


2171578 


990 


273 2210 


KWO 


335 


2948 


1880 


404 3791 


2430 


■l^S 


4737 


30^0 


5«5 


5792 


3760 


689 6953 4550 


30 





19771060 


3004 


15-H) 


4252 


2170 





5725 


2920 


7420 


3770 


1) 


9341 


4750 


I) 


11483 5850 


13848 70fi0 




2 


54 1351 865 


74 2004 


mo 


98 2786 


ISOil 


127 


3696 


23WI 


159 4734 


?ii50 


jw 


5900 


3811) 


211 


7194 


46=;o 


285 8617 -tillO 




5 


96 1332 851 


1271981 


1289 


164 2759 


1775 


206 


3666 


2350 


252 4701 


3020 


312 


5863 


3783 


373 


7155 


4622 


439 8574 5552 




10 


125 1301 829; 


1641944 


1254 


209 2716 


1733 


259 


3617 


2300 


316 4647 


2970 


3S(, 


5803 


3739 


156 


7090 


4574 


535 8505 5171 




15 


143 1272 807 


1871908 


1220 


237 2674 


lh'52 


292 


3570 


2250 


354 4594 


2920 


431 


5744 


3b95 


^07 


7026 


4527 


590 8437 53^)1 




20 


160 1243 ,714 


2071873 


1185 


260 2633 


1650 


319 


3523 


220(1 


384 4542 


2870 


4(>7 


5686 


30^0 


i4.S 


6964 


44S0 


639 8370 V>10 




30 


195 1189 745 


246 1807 


1130 


305 2555 


1585 


369 


3433 


2130 


440 4442 


2785 


=^40 


5574 


3565 


h15 


6842 


4375 


739 8239 522^ 


50 





2231 1195 


3441 


IS25 


4934 


2550 





6711 


3440 


8774 


44ti0 


I) 


11129 5635 





13767 n'>40 


16694 8430 




2 


41 1620 1010 


66 2431 


ir3l3 


86 3409 


2125 


113 


4554 


2X40 


141 5864 


3671) 


171 


7339 


4h30 


20'» 


8980 


.=i(;o|^ 


251 10788 oS60 




5 


90 1600 996' 


1182406 


149-1 


151 3380 


2102 


191 


4520 


2813 


234 5826 


3639 


2S^ 


7295 


45"7 


130 


8933 


5654 


394 10737 ti8 IS 




10 


118 1567 W2 


1542366 


146h 


196 3332 


20h4 


243 


4464 


27h7 


295 5763 


3585 


"(55 


7224 


4=^42 


■iV) 


8855 


5585 


491 10652 671^^ 




15 


136 1536 «48 


1772327 


1437 


222 3285 


2026 


274 


4409 


2721 


330 5701 


3534 


»(-, 


7155 


451 1 


4(i5 


8779 


5546 


542 10570 6710 




20 


151 1505 ■%4 


1952288 


1408 


244 3239 


1987 


300 


4356 


2^75 


361 5641 


3481 


431 


7086 


1479 


■^0(1 


8704 


5506 


586 10488 f^670 




30 


183 1446 ■876- 


2322214 


134^' 


287 3150 


1910 


347 


4753 


?.f^^'^\ 


412 5523 


r5431 


4"4 


6953 


447! 




8557 


-444 


672 10328 t)(.03 


100 





24911310 


3925 


2050 


5729 


2950 





7914 


4050 


10485 


5300 





13454 6700 





16817 8600 


2057810300 




2 


30 19751170 


44 3027 


1820 


72 4313 


2=^50 


95 


5834 


3500 


120 7591 


4W10 


I3,S 


9577 


5801) 


Ih') 


11803 


7200 


204 14264 SSIK) 




5 


82 19551159 


1073002 


1803 


136 4282 


2531 


172 


5797 


3475 


208 7548 


45e>t' 


245 


9528 


5769 


2^)3 


11748 


7162 


341 14204 87=^6 




10 


108 1923 1142 


1422961 


1775 


180 4231 


2500 


223 


5737 


3434 


268 7478 


450Vf 


?18 


9447 


5717 


371 11658 


7100 


436 14105 8683 




15 


126 1892 1124 


1632920 


1747 


206 4182 


24t>« 


252 


5678 


33^)2 


304 7409 


4451 


"i5.S 


9367 


5tJt'5 


4I.S 


11569 


7037 


487 14007 8p10 




20 


141 1861 1107 


1812880 


1719 


226 4133 


243S 


277 


5619 


3351 


330 7341 


43«4 


"i.S7 


9289 


5613 


4=12 


11482 6975. 


523 13910 853'^ 




30 


170 1802 1071 


2152803 


1663 


265 4037 


237=: 


319 


5505 


3267 


378 7209 


427^' 


44c. 


9136 


55(J9 


^W4 


11310 


6850 


592 13720 8391 




50 


241 1688 1000 


2922657 


1550 


350 3856 


2250 


415 


5289 


3100 


486 6956 


4050 


572 


8841 


5300 


fin"-) 


10979 6600 


752 13354 8100 



67 



Table 5-10 



UNIFORM PLUMBING CODE 



Table 5-10 Type B Double- Wall Vent 








Number of Appliances: 


Single 




Appliance Type: 


Category I 




Appliance Vent Connection: 


Single-Wall Metal Connector 



Vent Diameter — D (in.) 





t Lateral 


3 


4 


5 




6 


1 7 




8 






9 




10 1 12 




Heigh 










„,„ 


App] 


iance Inp 


ut Rating in 


Thousands of 




Btu per Hour 








H 


L 


FAN NAT 


fan 


NAT FAN NAT^ 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


FAN 


NAT 


FAN NAT 


FAN 


NAT 


(ft) 


(ft) 


MinMajiMax 


Min Max Mis*.. MinMax ls!fex 


Min Max 


;|^ 


MinMax Max 


Min Max 


Max 


Min Max 


Max 


MinMax Max 


MinMax 


Max 


6 





38 11 : 45 


59 


151 


85-; 85 


249 '140- 


126 


373 


: zm 


165 522 


284' 


211 


695 


Tjhi 


267 


894 


4o" 


371 1118 5M 


537 1639 


h49 




2 


39 51 ; 36 


60 


96 


.Ui.: 85 


156 104 ■ 


123 


231 


; im 


159 320 


213. 


201 


423 


2)>-! 


251 


541 


36!< 


347 673 45'i 


498 979 


648 




4 


NANA: 33 


74 


92 


M 102 


152 '102 


146 


225 


i 152 


187 313 


208'-' 


237 


416 


277 


295 


533 


r.hO 


409 664 -Wi 


584 971 


fi^S 




6 


NANA- 31 


83 


89 


m 114 


147 99' 


163 


220 


: MS 


207 307 


^03 ' 


263 


409 


271 


327 


526 


■\yi 


449 656 133 


638 962 


(.27 


8 





37 83; So 


58 


164 


n 83 


273 1S4" 


123 


412 


i 2S4 


161 580 


319' ■ 


206 


111 


\\\ 


258 


1002 


->3ft 


360 1257 h5h 


521 1852 


>«,7 




2 


39 56^ 39 


59 


108 


75 ' 83 


176 119' 


121 


261 


i 179 


155 363 


246 


197 


482 


321 


246 


617 


417 


339 768 313 


486 1120 


71^ 




5 


nana: 37 


11 


102 


m - 107 


168 iVk 


151 


252 


M71 


193 352 


235 ' 


245 


470 


^]1 


305 


604 


J.M 


418 754 ^00 


598 1104 


730 




8 


NANA; 33 


90 


95 


- '64 ' 122 


161 ,10? 


175 


243 


:-i63 


223 342 


225 


280 


458 


VJii 


344 


591 


s-a 


470 740 4i)^ 


665 1089 


715 


10 





37 87; 53-, 


57 


174 


m - 82 


293 '1^ 


120 


444 


t'2M 


158 628 


344'' 


202 


844 


4-iy 


253 


1093 


•■5-<i 


351 1373 71.-< 


507 2031 111 V 




2 


39 61 j 4| 


59 


117 


m ' 82 


193 128- 


119 


287 


; 194 


153 400 


272 


193 


531 


"o4 


242 


681 


45f> 


.332 849 3Sy 


475 1242 


84S 




5 


52 56 i 39 


76 


111 


76 : 105 


185 122 


148 


277 


hlB6 


190 388 


261 , 


241 


518 


344 


299 


667 


4-11 


409 834 544 


584 1224 


H2'^ 




10 


NANAi 34 


97 


100 


, $a -, 132 


171 112'' 


188 


261 


' 171 


237 369 


241 


296 


497 


12i 


363 


643 


42? 


492 808 =^20 


688 1194 


-\<^ 


15 





36 93 1 57 


56 


190 


111 80 


325 -186': 


116 


499 


\ m 


153 713 


388: 


195 


966 


=;23 


244 


1259 


fj'il 


336 1591 «•< 


488 2374 


1237 




2 


38 69: 47 


57 


136 


93 80 


225 149 


115 


337 


' 224' 


148 473 


314' 


187 


631 


U3 


232 


812 


54 i 


319 1015 0-1 


457 1491 


yS3 




5 


51 63 44 


75 


128 


86,' 102 


216 ,140 


144 


326 


■,.2X7 


182 459 


298 


231 


616 


111:1 


287 


795 


^2ft 


392 997 65", 


562 1469 


%3 




10 


NANA 39 


95 


116 


79 128 


201 -Bl'-- 


182 


308 


I^B 


228 438 


284- 


284 


592 


3S1 


349 


768 


50! 


470 966 628 


664 1433 


92S 




15 


NANA' NA 


NA 


NA 


. J2. ' 158 


186 124 


220 


290 


',m 


272 418 


269;. 


334 


568 


167 


404 


742 


AM 


540 937 M)i 


750 1399 


hy4 


20 





35 96- 60 


54 


200 


'■m ! 78 


346 mx 


114 


537 


' im 


149 772 


428, 


190 


1053 


^-■^ 


238 


1379 


750 


326 1751 927 


473 2631 


rwti 




2 


37 74; SO 


56 


148 


- 99 : 78 


248 16S ' 


113 


375 


, 24a 


144 528 


844' 


182 


708 


■If-H 


227 


914 


611 


309 1146 751 


443 1689 


lOyR 




5 


50 68 1 47 


73 


140 


M 100 


239 158 


141 


363 


-239- 


178 514 


334 


224 


692 


4"v' 


279 


896 


■^9f. 


381 1126 734 


547 1665 


1074 




10 


NANA. 41 


93 


129 


= 86 ' 125 


223 146 


177 


344 


, 224 


222 491 


31&' 


111 


666 


P.7 


339 


866 


571 ' 


457 1092 71a 


646 1626 


1037 




15 


nana: NA 


NA 


NA 


80- -155 


208 '13^ 


216 


325 


- 210: 


264 469 


301 -' 


325 


640 


4|L. 


393 


838 


349 


526 1060 o77 


730 1587 


100' 




20 


nana: na 


NA 


NA 


MA 186 


192 ,:i2d 


254 


306 


im. 


309 448 


285' 


374 


616 


10; 1 


448 


810 


526 


592 1028 151 


808 1550 


vr3 


30 





34 99 [ 63 


53 


211 


127' 76 


372 219 


110 


584 


\ 334 


144 849 


47X 


184 


1168 


(■vl7 


229 


1542 


852 


312 1971 1(156 


454 2996 


1=14- 




2 


37 80' 56 


55 


164 


«J 76 


281 -183 


109 


429 


' 279 


139 610 


392 


175 


823 


5-0 


219 


1069 


o9S 


296 1346 ?v-3 


424 1999 


HO-* 




5 


49 74 5i 


72 


157 


106 98 


271 173 


136 


417 


; 271- 


171 595 


'382'- 


215 


806 


■■■21 


269 


1049 


6K1 


366 1324 Ml. 


524 1971 


1283 




10 


NANA NA 


91 


144 


98 ' 122 


255 168 


171 


397 


i 257- 


213 570 


-367 


265 


1T7 


■^01 


327 


1017 


6^2 


440 1287 8? I 


620 1927 


12^ 




15 


NANA NA 


115 


131 


NA 151 


239 - 1S7, ' 


208 


377 


1 242- 


255 547 


,349. 


312 


750 


■ISl 


379 


985 


^^3'^ 


507 1251 70; 


702 1884 


12fiT 




20 


NANA- NA 


NA 


NA 


MA 181 


223 NA 


246 


357 


r 228 


298 524 


'333 , 


360 


723 


4ol 


433 


955 


nl5 


570 1216 768 


780 1841 


I16f' 




30 


NANA' NA 


NA 


NA 


HA -^ NA NA m '-, 


NA 


NA 


IMA; 


389 477 


•305 


461 


670 


■J2h 


541 


895 


574 


704 1147 720 


937 1759 


J 101 


50 





33 99 m 


51 


213 


135- 73 


394 239- 


105 


629 


.3il 


138 928 


'Sis', 


176 


1292 


7iM 


220 


1724 


Ltlfi 


295 2223 nf9 


428 3432 


lSli< 




2 


36 84. 63 


53 


181 


121 ' 73 


318 7m - 


104 


495 


312 


133 712 


443 


168 


971 


t.1,1 


209 


1273 


SI1 


280 1615 111Q7 


401 2426 


151 19 




5 


48 80 SNA 


70 


174 


il7 . 94 


308 %%' , 


131 


482 


:^- 


164 696 


435 ■; 


204 


953 


filU 


257 


1252 


7-*5 


347 1591 ^'i\ 


496 2396 


i4^f' 




10 


nana; NA 


89 


160 


NA, '■ 118 


i<)i m> 


162 


461 


'292 


203 671 


420 , 


253 


923 


>T 


313 


1217 


765 


418 1551 903 


589 2347 


1435 




15 


NANA, NA 


112 


148 


HA'- 145 


215 -174 


199 


441 


7m 


244 646 


^m ' 


299 


894 


'■'hi 


363 


1183 


73t. 


481 1512 9.11 


668 2299 


1421 




20 


NANA' NA 


NA 


NA 


MA ' 176 


257 NA,' 


236 


420 


\ 267 


285 622 


389' 


345 


866 


'■>AS 


415 


1150 


-■15 


544 1473 90^ 


741 2251 


13fi7 




30 


NANA- MA 


NA 


NA 


HA ;NA 


NA 'jsiA 


315 


376 


1 NA 


373 573 


Ka; 


442 


809 


502 


521 


1086 


t-19 


674 1399 S4.S 


892 2159 


nm 


100 





NANA! NA 


49 


214 


NA ' 69 


403 NA 


100 


659 


' m 


131 991 


■555'. 


166 


1404 


:-"6." 


207 


1900 


li03 


273 2479 P.(K1 


395 3912 


2012 




2 


NANAi NA 


51 


192 


NA; 70 


351 -MA 


98 


563 


i'373 


125 828 


'508' 


158 


1152 


f.y.<^ 


196 


1532 


933 


259 1970 UfiH 


371 3021 


'«17 




5 


NANA; NA 


67 


186 


NA 90 


342 HA 


125 


551 


|'3^ 


156 813 


501'-' 


194 


1134 


oS-( 


240 


1511 


921 


322 1945 1153 


460 2990 


17-;n 




10 


NANA' NA 


85 


175 


MA 113 


324 HA , 


153 


532 


j 354 


191 789 


486- 


238 


1104 


f.7: 


293 


1477 


OM2 


389 1905 1133 


547 2938 


I7..3 




15 


NANA' NA 


132 


162 


.NA , 138 


310 NA ' 


188 


511 


! 343-' 


230 764 


473 


281 


1075 


(•r-a 


342 


1443 


Sh4 


447 1865 LI 10 


618 2888 


I73i) 




20 


nana: jviA 


NA 


NA 


NA 168 


295 'MA., 


224 


487 


Ima 


270 739 


;«s' 


325 


1046 


M<J 


391 


1410 


S64 


507 1825 30.>*7 


690 2838 


l(j"f.i 




30 


NANA NA 


NA 


NA 


'MA 231 


264 MA' 


301 


448 


rNA 


355 685 


NA': 


418 


988 


\'A 


491 


1343 


'^24 


631 1747 liUl 


834 2739 


16:71 




50 


nana! MA 


NA 


NA 


MA ; NA NA NA 


NA 


NA 


', HA- 


540 584 


SNA' 


617 


866 


\\ 


711 


1205 


.\'\ 


138 1591 NA 


1138 2547 


1'JS9 



68 



WATER HEATERS 



Table 5-1 1 



Table 5-11 Masonry Chimney 








Number of Appliances: 


Single 




Appliance Type: 


Category I 




Appliance Vent Connection: 


Type B Double- Wall Connector 



















Type B Double- Wall Connector Diameter — 


D (in.) 














Latera 












To be used with chimney areas within the size limits at bottom 










3 




4 


1 




5 


6 






7 




1 8 






9 




10 1 


12 




Height 












Api 


jliance 


[npu 


t Rating 


in! 


"housands o 


fBti 


X per Ho 


ur 


^■■■•~i 






H 


L 


FAN -HAT 


FAN 


NAT 


FAN UAt 


FAN 


NAT 


FAN 


Hkt 


FAN 


NAT 


FAN NAT 


FAN nAi 


' FAN 


NAT 


(ft) 


(ft) 


MinMax M^ 


MinMax Mci\ 


MinMax Max 


MinMax 


MrlX 


Min 


Max MdX 


MinMax 


Mjx 


Min Max Mo\ 


Min 


Max Max 


Min Max 


Vl.ix 


6 


2 


NA NA 2$. 


NA 


NA 


52 


NA 


na' m 


NA NA 


130 


NA 


NA 


im 


NA NA 


247 


NA 


NA 329 


NA 


NA Ml 


NA 


NA 


^M 




5 


NA NA 2S , 


NA 


NA 


.i<) 


NA 


NA 82' 


NA NA 


1!7 


NA 


NA 


16& 


NA NA 


, '-'''I 


NA 


NA 2<5§ 


NA 


NA =3^6_^ 


NA 


NA 


5h1 


8 


2 


NA NA 29, 


NA 


NA 


•?- 


NA 


NA- ^ 


NA NA 


14.1 


NA 


NA 


198 


NA NA 


2f.fi 


84 


590 ^5fi 


100 


728 -44€ 


139 


1024 


.'.n 




5 


NA NA m 


NA 


NA 


^2 


NA 


NA. 88 


NA NA 


\M 


NA 


NA 


1^ 


NA NA 


247 


NA 


NA n-f 


149 


711 '423 


201 


1007 


640 




8 


NA NA M 


NA 


NA 


■lii 


NA 


na' as 


NA NA 


127 


NA 


NA 


W5 


NA NA 


zyj 


NA 


NA ^]K 


173 


695 410 - 


231 


990 


623 


10 


2 


NA NA 31 


NA 


NA 


hi 


NA 


NA|1C0 


NA NA 


162 


NA 


NA 


221 


68 519 


2"M 


82 


655 rWK 


98 


810 i|9l 


136 


1144 


724 




5 


NA NA Za 


NA 


NA 


i7 


NA 


NA m 


NA NA 


J4S 


NA 


NA 


2» 


NA NA 


277 


124 


638 : 365 


146 


791 ;*66 ' 


196 


1124 


7J2 




10 


NA NA ■ m 


NA 


NA 


1(1 


NA 


NA; 87 


NA NA 


i.yi 


NA 


NA 


.191 


NA NA 


lf>'- 


155 


610 M? 


182 


762 '441 


240 


1093 


Ol)« 


15 


2 


NA NA . m 


NA 


NA 


()7 


NA 


NA'iM 


NA NA 


17=) 


53 


475 


.2S0 


64 613 


^?6 


77 


779 Ul 


92 


968 ',5S2 


127 


1376 


S41 




5 


NA NA - 35 


NA 


NA 


62 


NA 


NA. IW 


NA NA 


]aA 


NA 


NA 


231 


99 594 


'h:. 


118 


759 4Jft 


139 


946 ;^3- 


186 


1352 


VS 




10 


NA NA 28 , 


NA 


NA 


^f' 


NA 


NA » 


NA NA 


15.1 


NA 


NA 


216 


126 565 


2'i)(-. 


148 


727 394 


173 


912 1^7 


229 


1315 


■^77 




15 


NA NA NA, 


NA 


NA 


■Ks 


NA 


na: m 


NA NA 


I'tl 


NA 


NA 


201 


NA NA 


2;<] 


171 


698 375 


198 


880 -485 


259 


1280 


742 


20 


2 


NA NA 3a 


NA 


NA 


"t 


NA 


NA;,ii4 


NA NA 


2ill 


51 


522 


274 


61 678 


, "'" 


73 


867 4^1 


87 


1083 627 


121 


1548 


•J53 




5 


NA NA - m 


NA 


NA 


ti'i 


NA 


NA; 116 


NA NA 


1K4 


80 


503 


'254 


95 658 


. .-isn 


113 


845 463 


133 


1059 mr 


179 


1523 


Om 




10 


NA NA NA 


NA 


NA 


fjO 


NA 


NA; im 


NA NA 


r2 


NA 


NA 


237 


122 627 


'■'3'^ 


143 


811 440 


167 


1022 J66 \ 


221 


1482 


nya 




15 


NA NA - 'ma 


NA 


NA 


NA 


NA 


NA/ 97 


NA NA 


Ji" 


NA 


NA 


220 


NA NA 


.^14 


165 


780 418 


191 


987 541- 


251 


1443 


.sW 




20 


NA NA ,MA 


NA 


NA 


\.\ 


NA 


NA; m 


NA NA 


148 


NA 


NA 


206 


NA NA 


296 


186 


750 397 


214 


955 :513 


277 


1406 


WIV 


30 


2 


NA NA « 


NA 


NA 


S2 


NA 


NA; 137 


NA NA 


21o 


47 


581 


303 


57 762 


421 


68 


985 558 


81 


1240 717 


111 


1793 


1112 




5 


NA NA NA 


NA 


NA 


Ti- 


NA 


NA-.tm 


NA NA 


UH 


75 


561 


;2ai 


90 741 


•jy. 


106 


962 526 


125 


1216 683 


169 


1766 


11194 




10 


NA NA NA 


NA 


NA 


67 


NA 


NA\ tm 


NA NA 


IM 


NA 


NA 


263 


115 709 


■)7.^ 


135 


927 mn 


158 


1176 $m 


210 


1721 


1(>2t 




15 


NA NA MA 


NA 


NA 


NA 


NA 


NA:lffi7 


NA NA 


171 


NA 


NA 


,243 


NA NA 


r.' 


156 


893 476 


181 


1139 '621. 


239 


1679 


ysi 




20 


NA NA ; NA 


NA 


NA 


NA 


NA 


NA- m 


NA NA 


i5'J 


NA 


NA 


227 


NA NA 


, 3:^2 


176 


860 450 ■ 


203 


1103 592, 


264 


1638 


94n 




30 


NA NA NA 


NA 


NA 


NA 


NA 


NAjMA 


NA NA 


NA 


NA 


NA 


18a 


NA NA 


= 2KS 


NA 


NA 416 


249 


1035 S^, 


318 


1560 


s: •/" 


50 


2 


NA NA MA 


NA 


NA 


n 


NA 


NAJia 


NA NA 


:"i 


NA 


NA 


'351 


51 840 


477 


61 


1106 633 


72 


1413 812 


99 


2080 


1243 




5 


NA NA ■ MA 


NA 


NA 


,\A 


NA 


NAi-m 


NA NA 


2^0 


NA 


NA 


323 


83 819 


41.'5 


98 


1083 596 


116 


1387 77« 


155 


2052 


122'' 




10 


NA NA HA 


NA 


NA 


XA 


NA 


NA; 138 


NA NA 


215 


NA 


NA 


304 


NA NA 


•424 


126 


1047 567 


147 


1347 733 


195 


2006 


1147 




15 


NA NA , NA 


NA 


NA 


.\'.\ 


NA 


NA| 127 


NA NA 


lyy 


NA 


NA 


28i 


NA NA 


400 


146 


1010 539 


170 


1307 '702 


222 


1961 


10'") 




20 


NA NA NA 


NA 


NA 


NA 


NA 


naIna 


NA NA 


1ST 


NA 


NA 


■2M 


NA NA 


. 37(j 


165 


977 511 


190 


1269 66$ 


246 


1916 


Ui-50 




30 


NA NA NA 


NA 


NA 


NA 


NA 


NA^NA 


NA NA 


NA 


NA 


NA 


-NA' 


NA NA 


327 


NA 


NA ^^ 


233 


1196=623 


295 


1832 


9S4 


Minimum 
Internal Area 
of Chimney 
Square Inches 


12 


19 


28 


38 


50 


63 


78 


95 


132 


Minimum 
Internal Area 
of Chimney 
Square Inches 


49 


88 


137 


198 


269 


352 


445 


550 


792 



69 



Table 5-12 



UNIFORM PLUMBING CODE 



Table 5-12 Masonry Chimney 



















Number of Appliances: 


Single 






Appliance Type: 


Category I 




Appliance Vent Connection: 


Single- Wall Metal Connector 














Single-Wall Metal Connector Diameter 


— D(in.) 










Lateral 








To be usecTwith chimney areas within the size 


limits at bottom 










3 


4 


5 


6 


7 






8 


9 


10 


12 


Height 














Appliance In] 


)ut Rating 


in! 


'housands of 1 


Jtu per Hour 










H 


L 

(ft.) 


FAN 


NAt 
Max 


FAN kAl 
Mln Max M«X 


FAN NAt 
Min Max 'Max 


FAN 
Min Max 


mi 

5 Max 


FAN 

Min M.i\ 


NAT 

M.IX 


FAN NAf 
Min Max • Max 


FAN UAI 
Min Max :Max 


FAN NAl 
Min Max jMax 


¥fi 
Min 


lN NATS 


(ft.) 


Min Max 


Max Max; 


6 


2 


NA 


NA 


i28 


NA NA §2 


NA 


NA ! m 


NA NA 


:130 


NA ,\\ 


ixr 


NA 


NA ; 247 


NA NA '319 


NA 


NA :400 


NA 


NA 580? 




5 


NA 


NA 


25, 


NA NA , la 


NA 


NA , 81 


NA NA 


'l%6 


NA W 


|,M 


NA 


NA ; 230 


NA NA ^297 


NA 


NA ,375 


NA 


NA 5m: 


8 


2 


NA 


NA 


l2$'. 


NA NA • 55 


NA 


NA ; 93 


NA NA 


lim 


NA \\ 


I'J? 


NA 


NA . 265 


NA NA ]zm^ 


382 


725 '445 


549 


1021 650 ; 




5 


NA 


NA 


■26, 


NA NA : 51 


NA 


NA . 87 


NA NA 


S133 


NA NiA 


132 


NA 


NA ' 2-46 


NA NA ;327 


NA 


NA ,422 


673 


1003 6^ ; 




8 


NA 


NA 


• ^ 


NA NA ; 47- 


NA 


NA 82 


I NA NA 


j,126 


NA \ \ 


\r-i 


NA 


NA : 237 


NA NA .317 


NA 


NA ;40S 


747 


985 621 1 


10 


2 


NA 


NA 


!M , 


NA NA "61 


NA 


NA -m 


NA NA 


iUt 


NA \\ 


210 


216 


518 2«7 


271 654 "387 


373 


808 '490 


536 


1142 722 \ 




5 


NA 


NA 


i28 


NA NA , 56 


NA 


NA 1 95 


NA NA 


'U7 


NA \\ 


2iC- 


NA 


NA 276 


334 635 364 


459 


789 •465 


657 


nil 710 




10 


NA 


NA 


|2I 


NA NA , 4S 


NA 


NA ! «6- 


NA NA 


\m 


NA \\ 


Iv.) 


NA 


NA ' 261 


NA NA '34S 


547 


758 -441 


771 


1088 665 ; 


15 


2 


NA 


NA 


\m 


NA NA 67 


NA 


NA 1113- 


'. NA NA 


;i78 


166 T! 


240 


211 


611 S35 


264 776 '<m 


362 


965 -560 


520 


1373 8^ \ 




5 


NA 


NA 


ia2 ' 


NA NA - 61 


NA 


NA (106 


■ NA NA 


163 


NA N:\ 


i'iii 


261 


591 , 312 


325 755 -414 


444 


942 -531 


637 


1348 825 ■ 




10 


NA 


NA 


l-n 


NA NA : 64 


NA 


NA ^ % 


•■ NA NA 


!1S1' 


NA N\ 


214 


NA 


NA : 294 


392 722 392 


531 


907 i504 


749 


1309. 774 : 




15 


NA 


NA 


■fiA 


NA NA-,46 


NA 


NA J 87 


NA NA 


-138 


NA N!\ 


I9S 


NA 


NA = 278 


452 692 :371 


606 


873 l4Bt 


841 


1272 ,738 ■ 


20 


2 


NA 


NA 


'M 


NA NA ; 5^ 


NA 


NA il23 


NA NA 


;,200 


163 ";ii 


27-. 


206 


675 ! 374 


258 864 'im 


252 


1079 ,6^ 


508 


1544 95© 1 




5 


NA 


NA 


',m 


NA NA ! 67 


NA 


NA jll5 


1 NA NA 


-183 


NA \A 


2.-'^ 


255 


655 , dm 


317 842 ;461 


433 


1055 s594 


623 


1518 930 ; 




10 


NA 


NA 


;MA' 


NA NA ; S9 


NA 


NA \im 


1 NA NA 


'170- 


NA \\ 


2^'- 


312 


622 330 


382 806 437' 


517 


1016 i562 


733 


1475 875 ; 




15 


NA 


NA 


NA 


NA NA; NA- 


NA 


NA ! 95 


' NA NA 


-156 


NA W 


21;' 


NA 


NA 311 


442 773 '4W 


591 


979 539 


823 


1434 835- 




20 


NA 


NA 


,HA 


NA NA^NA 


NA 


NA 1 m 


i NA NA 


-144 


NA \\ 


2ii2 


NA 


NA ' 292 


NA NA -392 


663 


944 1510 


911 


1394, wm ■ 


30 


2 


NA 


NA 


•41 


NA NA ■ m 


NA 


NA -136 


NA NA 


1 215 


158 -^-h 


lo: 


200 


759 ; 420 


249 982 ]^6 


340 


1237 -715 


489 


1789 1110| 




5 


NA 


NA 


.NA 


NA NA . 75 


NA 


NA '127 


: NA NA 


-■im 


NA \ \ 


27'' 


245 


737 391 


306 958 '524 


417 


1210 -6^ 


600 


1760 1090; 




10 


NA 


NA 


,MA 


NA NA - U 


NA 


NA '113 


> NA NA 


,182 


NA \A 


2sf) 


300 


703 370 


370 920 .496- 


500 


1168 =614 


708 


1713 imO; 




15 


NA 


NA 


MA 


NA NA'MA 


NA 


NA ,105 


: NA NA 


■,im 


NA \A 


2W 


NA 


NA ■ 349 


428 884 .471 


572 


1128 ;615 


798 


1668 975 I 




20 


NA 


NA 


.MA 


NA NA MA 


NA 


NA ' m 


NA NA 


ass 


NA \A 


22-5 


NA 


NA , 327 


NA NA '445 


643 


1089 !S85 


883 


1624 932 ! 




30 


NA 


NA 


'MA 


NA NA,MA 


NA 


NA jl^A 


NA NA 


;W^ 


NA \A 


1»2 


NA 


NA .261 


NA NA ;4a8 


NA 


NA '544 


1055 1539 865 \ 


50 


2 


NA 


NA 


•MA 


NA NA 91 


NA 


NA ;i60 


1 NA NA 


iWQ 


NA \% 


y:\} 


191 


837 475 


238 1103 ■ 631 


323 


1408 '810 


463 


2076 1240 ; 




5 


NA 


NA 


•MA- 


NA na;ha 


NA 


NA (149 


' NA NA 


i22a 


NA ,\ \ 


.■"■21 


NA 


NA 442 


293 1078 S^ 


398 


1381 ',7m 


571 


2044 1220 




10 


NA 


NA 


-HA 


NA NA-NA 


NA 


NA ;i3g 


\ NA NA 


§212 


NA \A 


.V'l 


NA 


NA 420 


355 1038 : 562 


447 


1337 ;7aa 


674 


1994 1140 : 




15 


NA 


NA 


-NA 


NA NA -NA 


NA 


NA ' 124 


NA NA 


;-i95 


NA \\ 


27S 


NA 


NA ' 395 


NA NA 'mS- 


546 


1294 '695 


761 


1945 1090; 




20 


NA 


NA 


;na 


NA NA MA 


NA 


NA jHA 


NA NA 


U80 


NA \\ 


;ss 


NA 


NA , 370 


NA NA ;504~ 


616 


1251 ,6m 


844 


1898 1040? 




30 


NA 


NA 


jNA 


NA NA.MA 


NA 


NA ;NA 


NA NA 


LMA 


NA \i\ 


\A 


NA 


NA 318 


NA NA |458 


NA 


NA :610 


1009 1805 970 , 


Minimum 




































Internal Area of 




12 




19 




28 


38 




50 






63 


78 




95 




132 


Chimney Square 
Inches 




































Maximum 
Internal Area of 




49 




88 




137 


198 




269 






352 


445 




550 




792 


Qiiirmey Square 
Inches 





































70 



WATER HEATERS 



Table 5-13 



Table 5-13 Single- Wall Metal Pipe or Type B Asbestos Cement Vent 





Number of Appliances: 


Single 




Appliance Type: 


Category I 




Appliance Vent Connection: 


Connected Directly to Vent 



Single- Wall Metal Connector Diameter - D (in.) 
To be used with chimney area within the size limits at bottom 





Lateral 
L 


3 


1 4 


5 1 


6 1 


7 1 


8 


10 


12 


Height 




Appliance Input Rating in Thousands of Btu 


per Hour 






H 


















(ft.) 


(ft.) 




Maximum Appliance 


Input Rating 


in Thousands of Btu per Hour 




6 





39 


70 


116 


170 


232 


312 


500 


750 




2 


31 


55 


94 


141 


194 


260 


415 


620 




5 


28 


51 


88 


128 


177 


242 


390 


600 


8 





42 


76 


126 


185 


252 


340 


542 


815 




2 


32 


61 


102 


154 


210 


284 


451 


680 




5 


29 


56 


95 


141 


194 


264 


430 


648 




10 


24 


49 


86 


131 


180 


250 


406 


625 


10 





45 


84 


138 


202 


279 


372 


606 


912 




2 


35 


67 


111 


168 


233 


311 


505 


760 




5 


32 


61 


104 


153 


215 


289 


480 


724 




10 


27 


54 


94 


143 


200 


274 


455 


700 




15 


NA 


46 


84 


130 


186 


258 


432 


666 


15 





49 


91 


151 


223 


312 


420 


684 


1040 




2 


39 


72 


122 


186 


260 


350 


570 


865 




5 


35 


67 


110 


170 


240 


325 


540 


825 




10 


30 


58 


103 


158 


223 


308 


514 


795 




15 


NA 


50 


93 


144 


207 


291 


488 


760 




20 


NA 


NA 


82 


132 


195 


273 


466 


726 


20 





53 


101 


163 


252 


342 


470 


770 


1190 




2 


42 


80 


136 


210 


286 


392 


641 


990 




5 


38 


74 


123 


192 


264 


364 


610 


945 




10 


32 


65 


115 


178 


246 


345 


571 


910 




15 


NA 


55 


104 


163 


228 


326 


550 


870 




20 


NA 


NA 


91 


149 


214 


306 


525 


832 


30 





56 


108 


183 


276 


384 


529 


878 


1370 




2 


44 


84 


148 


230 


320 


441 


730 


1140 




5 


NA 


78 


137 


210 


296 


410 


694 


1080 




10 


NA 


68 


125 


196 


274 


388 


656 


1050 




15 


NA 


NA 


113 


177 


258 


366 


625 


1000 




20 


NA 


NA 


99 


163 


240 


344 


596 


960 




30 


NA 


NA 


NA 


NA 


192 


295 


540 


890 


50 





NA 


120 


210 


310 


443 


590 


980 


1550 




2 


NA 


95 


171 


260 


370 


492 


820 


1290 




5 


NA 


NA 


159 


234 


342 


474 


780 


1230 




10 


NA 


NA 


146 


221 


318 


456 


730 


1190 




15 


NA 


NA 


NA 


200 


292 


407 


705 


1130 




20 


NA 


NA 


NA 


185 


276 


384 


670 


1080 




30 


NA 


NA 


NA 


NA 


222 


330 


605 


10 



71 



Table 5-14 



UNIFORM PLUMBING CODE 



Table 5-14 Type B Double-Wall Vent 



Number of Appliances: 



A ppliance Typ e: 



Appliance Vent Connection: 



Two or More 



Category I 



Type B Double-Wall Connector 















Type 


B Double- Wall Vent and Connector Diameter — D (in 


.) 










3 






4 






5 


1 6 






7 


1 


8 






9 


1 10 
















^ 


PPl 


iance Inp 


ut Rating in 


Thousands (^ 


fBti 


iper 


Hoi^ 


r 








Heigl 


\t Rise 
R 
(ft.) 


FAN NAT 
Min MaxMax 


FAN 1 


vIAT 
:Maj 


FAN NA* 
cMinMax Mas^ 


FAN 


\AT 
Max 


FAN 
MinMax 


MAT 
Max 


FAN 
Vlin Max 


NAT 
Max 


FAN 
Min Max 


NAT 
Max 


FAN 


VAT 


H 
(ft.) 


Min 


Ma> 


Vlin Max 


MinMaxMax, 


6 


1 


22 


37 


26 


35 


(1(1 


46 


46 


106 


.72; 


58 164 


104 


77 


225 


142 


92 


296 


185 


104 


376 


237 


128 466= 


289 




2 


23 


41 


3 J 


37 


75 


55 


48 


121, 


86 i 


60 183 


124 


79 


253 


168 


95 


333 


220 


112 


424 


282 


ni 526! 


345 




3 


24 


44 


35 


38 


SI 


62 


49 


132^ 


' 96 ; 


62 199 


134 


82 


275 


189 


97 


363 


248 


114 


463 


317 


134 575; 


38b 


8 


1 


22 


40 


27 


35 


72 


48 


49 


114: 


. . s 
76 1 


64 176 


104 


84 


243 


148' 


100 


320 


194 


MS 


408 


24S 


138 507: 


303 




2 


23 


44 


32 


36 


SO 


57 


51 


128; 


90 1 


66 195 


129 


86 


269 


175 


103 


356 


230 


121 


454 


294 


141 564: 


358 




3 


24 


47 


3fi 


37 


S7 


64 


53 


139 


Wll 


67 210 


145 


88 


290 


498 


105 


384 


258 


123 


492 


330 


143 612. 


402 


10 


1 


22 


43 


2M 


34 


7S 


50 


49 


123' 


'7^} 


65 189 


II? 


89 


257 


'iM 


106 


341 


200 


125 


436 


257 


146 542' 


314 




2 


23 


47 


33 


36 


Sh 


5<i 


51 


136- 


93 i 


67 206 


134 


91 


282 


182 


109 


374 


238 


12s 


479 


305 


149 596 


372 




3 


24 


50 


37 


37 


42 


67 


52 


146 


104! 


69 220 


150 


94 


303 


2'0& 


111 


402 


268 


131 


515 


342 


152 642. 


417 


15 


1 


21 


50 


30 


33 


S4 


53 


47 


142; 


83 \ 


64 220 


120 


88 


298 


ms 


110 


389 


214 


134 


493 


273 


162 609: 


333 




2 


22 


53 


35 


35 


"■Hi 


63 


49 


153 


99'; 


66 235 


142 


91 


320 


'»3 


112 


419 


253 


137 


532 


323 


165 658 


394 




3 


24 


55 


40 


36 


102 


71 


51 


163, 


111; 


68 248 


160 
J 25 


93 


339 


-218 


115 


445 


2b(i 


140 


565 


165 


167 700- 


444 


20 


1 


21 


54 


31 


33 


44 


56 


46 


157^ 


87; 


62 246 


86 


334 


m 


107 


436 


224 


131 


552 


285 


158 681 


347 




2 


22 


57 


37 


34 


105 


66 


48 


167; 


104; 


64 259 


149 


89 


354 


'202 


110 


463 


2(.i5 


134 


587 


334 


161 725. 


414 




3 


23 


60 


42 


35 


111) 


74 


50 


176; 


im: 


66 271 


168 


91 


371 


228 


113 


486 


300 


137 


618 


383 


Ib4 764, 


4(i6 


30 


1 


20 


62 


33 


31 


113 


59 


45 


181^ 


93,1 


60 288 


134 


83 


391 


182 


103 


512 


238 


125 


649 


305 


151 802- 


372 




2 


21 


64 


39 


33 


lis 


70 


47 


190; 


-110! 


62 299 


158 


85 


408 


215. 


105 


535 


2S2 


124 


679 


360 


155 840' 


439 




3 


22 


66 


44 


34 


123 


79 


48 


198 ■ 


'I24i 


64 309 


17S 


88 


423 


-Ml 


108 


555 


317 


132 


706 


405 


158 874, 


494 


50 


1 


19 


71 


36 


30 


133 


64 


43 


216! 


101; 


57 349 


145 


78 


477 


m 


97 


627 


257 


120 


797 


330 


144 984: 


403 




2 


21 


73 


43 


32 


]37 


7b 


45 


223, 


119; 


59 358 


172 


81 


490 


234 


100 


645 


30b 


123 


820 


392 


1481014 


478 




3 


22 


75 


4« 


33 


141 


86 


46 


229; 


134' 


61 366 


194 


83 


502 


263 


103 


661 


343 


126 


842 


441 


1511043 


538 


100 


1 


18 


82 


37 


28 


1iS 


6b 


40 


262 > 


1041 


53 442 


150 


73 


611 


264 


91 


810 


266 


112 


1038 


341 


1351285 


417 




2 


19 


83 


44 


30 


Ihl 


711 


42 


267' 


123-1 


55 447 


178 


75 


619 


242 


94 


822 


31b 


115 


1054 


405 


1191306 


494 




3 


20 


84 


50 


31 


163 


89 


44 


272; 


-1301 


57 452 


200 


78 


627 


272 97 


834 


355 


lis 1069 


435 


1421327 


555 



Common Vent Capacity 













Type B Double- Wall Common Vent Diameter - 


-D(in.) 




4 


5 


6 7 


8 


9 


10 


Vent 
Height 

H 

(ft.) 


FAN FAN WAT 
+FAN+NAT+kAf 


FAN 
+FAN 


FAN 
+NAT 


C 

NAT 
+NAI 


ombined Appliat 

FAN FAN NAT; 
+FAN+NAT +NAT 


ce Input Rating ir 

FAN FAN I^AT 
+FAN +NAT +^IAi 


I Thousands of Bt 

FAN FAN NAT 
+FAN+NAT+NAT 


u per Hour 

FAN FAN NAT 
+FAN+NAT+MA1 


FAN FAN NAT 

+FAN+NAT+NAT 


6 


92 


81 


165 - 


140 


116 


tm'' 


204 161 147 


309 248 


200 


404 314 


:260 


547 434 33^5 


672 520 410 


8 


101 


90 


-75 ' 


155 


129 


1,14 


224 178 163 


339 275 


^3 


444 348 


290 


602 480 378 


740 577 4b5 


10 


110 


97 


;79 , 


169 


141 


124 


243 194 178 


367 299 


242'' 


477 377 


315 


649 522 405 


800 627 445 


15 


125 


112 


91 ' 


195 


164 


144 ~ 


283 228 206' 


427 352 


l280 


556 444 


-365 


753 612 465 


924 733 565 


20 


136 


123 


102 


215 


183 


160, 


314 25=i 229 


475 394 


310 


621 499 


^405 


842 688 523 


1035 826 640 


30 


152 


138 


118 


244 


210 


■185: 


361 247 266 


547 459 


P60 


720 585 


470 


979 808 m 


1209 975 740 


50 


167 


153 


134 


279 


244 


214' 


421 353 310 


641 547 


1423 


854 706 


550 


1164 977 705' 


1451 1188 SbO \ 


100 


175 


163 


NA 


311 


277 


NA 


489 421 mA 


751 658 


[479 


1025 873 


;625- 


1408 1215 800 


1784 1502 975 



72 



WATER HEATERS 



Table 5-14 (Continued) 



Table 5-14 Continued 





i^onnectoi 
Rise 
R 

(ft.) 




Number of Appliances: 


Twc 


> or More 








Appliance Type: 


Category 


I 








Appliance Vent Connection: 


Type B Double- Wall Vent Connector 








Type 


B Double-Wall Vent Connector Diameter - D (in.) 










12 


14 


16 


18 


20 


22 


24 


Venl C 

Height 

H 

(ft.) 


FAN NaI 
Min Max Max 


FAN 
Min Max 


Appliance Input Rating Limits in 

HAT FAN MAT FAN HAT 
Max' Min Max Max Min Max Max 


Thousands of Btu per Hour 

FAN MAT FAN f^Ati FAN NAT 
Min Max Max; Min Max Mad Min Max Max 


6 


2 
4 
6 


174 764 m 
180 897 616' 

NA NA NA; 


223 
230 

NA 


1046 
1231 

NA 


■653 
'MA 


281 
287 

NA 


1371 :855 
1617 1081 

NA NA 


346 
352 

NA 


1772 
2069 

NA 


lose 

1370 
NA 


NA 
NA 
NA 


NA 
NA 
NA 


-MA 
MA 
MA 


NA 
NA 
NA 


NA =Na! NA 
NA NAjNA 
NA NA; NA 


NA NA 
NA NA 
NA NA 


8 


2 
4 
6 


186 822 516 
192 952 6Mi 
198 1050 772 : 


238 
244 
252 


1126 
1307 
1445 


1884 
iQ72 


298 
305 
313 


1478 910 
1719 1150 
1902 1390 


365 
372 
380 


1920 
2211 
2434 


1150 
1460 
1770 


NA 
471 
478 


NA 
2737 
3018 


MA 
1800 
21^ 


NA 
560 
568 


NA 'NA' NA 
3319 2180 662 
3665 264q 669 


NA KA 
3957 2590 
4373 3130 


10 


2 
4 
6 


196 870 'm\ 
201 997 r664 
207 1095 792: 


249 
256 
263 


1195 
1371 
1509 


7^ 

■mA 


311 
318 
325 


1570 -955 
1804 1205 

1989 ms 


379 
387 
395 


2049 
2332 
2556 


1205 
1535 
lSft5 


NA 
486 
4^)4 


NA 
2887 
3169 


MA 
1690 
2290 


NA 
581 
589 


NA NA'NA 
3502 i28d 686 

3849 '27^ 694 

t, 


NA ISA 
4175 271 U 
4593 327(J 


15 


2 
4 
6 


214 967 568. 
221 1085 712 > 
228 1181 'SS6- 


272 
279 
286 


1334 
1499 
1632 


790 

\mi 

ill! 


336 
344 
351 


1760 3030 
1978 1320 
2157 1610 


408 
416 
424 


2317 
2579 
2796 


130? 
16h5 
2025 


NA 
523 
533 


NA 
3197 
3470 


NA 
2060 
2510 


NA 
624 
634 


NA -NA;NA NA NA 
3881 24W 734 4631 2^'60 
4216 30^ 743 5035 3b00 


20 


2 
4 
6 


223 1051 S96. 
230 1162 748- 
237 1253 m. 


291 
298 
307 


1443 
1597 
1726 


1064 

1288 


357 
365 
373 


1911 1095 
2116 1395 
2287 1695 


430 
438 
450 


2533 
2778 
2984 


138? 
176? 
2145 


NA 

354 
3h7 


NA 
3447 
3708 


MA 
2180 
2650 


NA 
661 
671 


NA .NA NA 
4190 "2630 772 
4511 3190 785 


NA KA 
5005 3130 
5392 37'JO 


30 


2 
4 
6 


216 1217 632' 
223 1316 792, 
231 1400 9S2j 


286 
294 
303 


1664 
1802 
1920 


=910 
jil60 

mo 


367 
376 
384 


2183 1190 
2366 1510 
2524 1830 


461 
474 
485 


2891 
3110 
3299 


154C 
192C 

2340 


\A 
619 

632 


NA 
3840 
4080 


MA 
2365 
2875 


NA 
728 
741 


NA =NA, NA 
4861 im 847 
4976 3480 860 


NA NA 
5606 3410 
5961 4150 


50 


2 
4 
6 


206 1479 m9\ 
213 1561 mOl 
111 1631 1031 


273 
281 
290 


2023 
2139 
2242 


mi 

1575 


350 
359 
369 


2659 1315 
2814 1685 
2951 2055 


435 
447 
461 


3548 
3730 
3893 


1665 
213S 
2605 


NA 
580 
594 


NA 
4601 
4808 


MA 
2633 
3208 


NA 
709 
724 


NA 'NA'NA 
5569 3185. 851 
5826 hm 867 


NA NA 
6633 3790 
6943 4620 


100 


2 
4 
6 


192 1923 712; 

200 1984 aaa 

208 2035 1061 


254 
263 

272 


2644 
2731 
2811 


1050 

1346 
1642 


326 
336 
346 


3490 K370 
3606 1760 
3714 2150 


402 
414 
426 


4707 
4842 
4968 


1740 
222C 
27M 


NA 
523 
539 


NA 
5982 
6143 


MA 
2750 

3350 


NA 
639 
654 


NA :NA; NA 
7254 3330 769 
7453 4070 786 


NA NA 
8650 3^»50 
8892 4«10 



Common Vent Capacity 













Type B Double- Wall Common Vent Diameter — D (in.) 










12 


14 


~n . 


16 


18 




20 


1 22 


1 


24 


Vent 

Height 

H 

(ft) 


FAN FAN "HAi 


Comt 

FAN FAN MAI 


lined Applianc 

FAN FAN MAT 

xpAM 4-MAT iMAJP 


e Input Rating 

r ' ■ 

FAN FAN MAT 
-^FAN -^NAT -^HAX 


in Thousands of 1 

FAN FAN MAT 

-i-FAN J-MAT i.M4»l" 


5tu per Hour 

FAN FAN 'mat FAN FAN MAT 

-^FAN-^NAT AhJiT -i-FAM j-MATj-KJA-T; 


6 


900 696 ,^,' 


1784 


990 


m$ 


1735 


1336 'la^ 


2253 1732 1f$4§- 


2838 


2180 


i$^ 


3488 2677 


I'^roJizQfi^ 


3226 2391.1 


8 


994 773 :^2 


1423 


1103 


M2- 


1927 


1491 1190 


2507 1936 iSlO 


3162 


2439 


=1860 


3890 2998 


2200 


4h95 


3616 26S0 


10 


1076 841 ,712 


1542 


1200 


995 


2093 


1625 'im 


2727 2113 1645 


3444 


2665 


'Qsm 


4241 3278 


2400 


3123 


3957 2920 


15 


1247 986 825 


1794 


1410 


nm~ 


2440 


1910 isio 


3184 2484 1910 


4026 


3133 


2360 


4971 3862 


2790 


W116 


4670 3400 


20 


1405 1116 .91$- 


2006 


1588 


mm 


2722 


2147 im 


3561 2798 2140 


4548 


3552 


2640' 


5573 4352 


3121) h749 


5261 $m) 


30 


1658 1327 1CS5, 


2373 


1892 


1525- 


3220 


2558 ;i9M 


4197 3326 2S20 


5303 


4193 


3110 


6539 5157 


36.S0 ' 71)40 


6247 4480 


50 


2024 1640 1280' 


2911 


2347 


1M3' 


3964 


3183 ;2430 


5184 4149 3075 


6567 


5240 


3800. 


8116 6458 


450(} , 'O'i? 


7813 5475 


100 


2569 2131 mW 


3732 


3076 


2«o; 


5125 


4202 Sa®' 


6749 5509 «50 


8597 


6986 


=5000 


10681 8648 


5920 


13004 10499 72110 



73 



Table 5-15 



UNIFORM PLUMBING CODE 



Table 5-15 Type B Double- Wall Vent 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection^ Single-Wall Metal Connector 
Vent Connector Capacity 



Two or More 



Category I 



Single- Wall Metal Vent Connector Diameter — D (in.) 



8 



10 



Vent Connectoi 
Height Rise 

H R 

(ft) (ft) 



Appliance Input Rating Limits in Thousands of Btu per Hour 



FAN 
Min Max 



NAT 
Max 



FAN HAJ 



Min Max MftX 



FAN 



kAt 



Min Max; Max 



F AN mt 

Min Max Mm 



FAN IMAI 



Min Max Max 



FAN -MAT 



Min Max.MSK 



FAN iHAI 



Min Max j M a» 



FAN NAT 



Min Max Max 



NA NA 
NA NA 
NA NA 



26 
?4 



NA 
NA 
NA 



NA ;46 
NA i54 
NA 162 



NA NA 
NA NA 
121 131 



71 



NA NA'102 
168 182 !123 
175 198 il^ 



207 223 1140 
215 251 lU7 
Til 273 188 



262 293 \ 183 
271 331 \ 219 
279 361 ^ 247 



325 373 ; 231 
334 422 j'28l 
344 462 JMfe 



447 463 2S6 
458 52-1 344 
468 574 385 



NA NA 
NA NA 
NA NA 



32 
-15 



NA 
NA 
NA 



NA 'fe 

NA '.m 
NA ;,M 



NA NA 
125 126 
130 138 



: -7s 



NA NA'ifM 
184 193 ''m 
191 208 ;i44 



226 240 145 
234 266 1^' 
241 287 mi 



285 316 : 
293 353 ; 
3 Q2 3 8 1 : 



mL 



352 403 j 244 
360 450 \ 292 
370 489 i %7k 



481 502 
492 560 
501 609 



299 
355 
400 



10 



NA NA 
NA NA 
NA NA 



28 
33 
36 



NA 
84 



NA '^m 
85 \m 
91 \m.. 



119 121 
124 134 
129 144 



771 



182 186 ilO 
189 203 ''\%% 
197 217 I4S 



240 253 1100, 
248 278 |183 
257 299 I2O3' 



302 335 
311 369 
320 398 



\im 



371 429 1 2521 
381 473 -iWi. 
391 511 L339 



506 534 30S 
517 58'-^ ^hS 
528 637 413 



15 



NA NA 
NA NA 
NA NA 



29 
34 
39 



79 
83 
87 



87 52 
94 1-6% 
100 M 



116 138 
121 150 
127 160 



177 214 116 
185 230 Itm 
193 243157 



238 291 il58 
246 314 llS9 
255 333 bs 



312 380 
321 411 
331 438 



;208 



281 



397 482 I 266 
407 522 [mJi 
418 557 la 



556 59h ;.24 
568 64(1 387 
579 690 437 



20 



49 

52 
55 



56 
59 
62 



30 
40 



78 
82 
87 



97 5i 
103 '64 
107 '72 



115 152 
120 163 
125 172 



101; 

1131 



175 238 ;i20 
182 252 ,iM' 
190 264 -IM 



233 325 1165- 
243 346 |197 
252 363 =-22S. 



306 425 
317 453 
326 476 



217 



390 538 \W^ 
400 574 ;'3 
412 607 r-37B: 



546 664 336 
558 70'-> 403 
570 75t) 45 7 
35S 
425 
Jfil 



30 



47 60 
51 62 
_54 64. 



42 



77 
81 
_8^ 



110 ;S7 
115 ■67' 
119 -76 



112 175 
117 185 
122 193 



169 278 'II& 
177 290 mi' 

185 30Q;ia„ 



226 380 ;if5 
236 397 'm% 

244 412 'm.. 



296 497 
307 521 
316 542 



230 

274' 



378 630 i i 
389 662 : 34^ 
400 690 \ 'm 



528 77^) 
541 81" 
555 855 



50 



100 



46 
49 

52 



69 

71 
72 



45 
48 
51 



79 



81 



34 
40 
.41. 
34 
41 
46 



75 
79 



128 \m, 

132 -72 
136 \M . 



109 207 
114 215 
119 221 



il3! 



162 336 'im 
170 345 ,}M 

17 8 35 3 \%m :. 



217 460 188 
226 473 i223 
235 486 J2.12 



284 604 
294 623 
304 640 









364 768 \M.€ 
376 793 s m 
387 816 \j 



71 
75 
79 



150 61 

153 ;.73 
157 m 



104 249 
110 255 
114 260 



il29- 



153 424 |1# 
160 428 '■ii§7- 
168 433 -im 



205 585 §192 
212 593 J228 
222 603 1256 



269 774 
279 788 
289 801 



249 
299- 



345 993 ! i 
358 1011 1 383 
368 10271.4311 



507 951 384 

520 983 45S 

535 101 3 518 

476 123(1 193 

490 125" 4^9 

506 1280 527 



Common Vent Capacity 

















Type B Double-Wall Vent Diameter 


— D(in.) 








4 






R 






fi 7 


8 




1 


9 


in 


Vent 
Height 
H 


FAN FAN NAT 

-i-FAN+NAT+N'Ar 


FAN FAN NAT 

±EAN_+NA1lJ-NAi 


Combined Appli 

FAN FAN ^AT, 

+FAN+NAT+,\AT 


ance Input Rating 

FAN FAN PVAT 
+FAN +NAT i\Ar 


in Thousands of Bt 

FAN FAN ^T 
+FAN +NAT 4.MA-i 


uper 

FAN 
•+FAN 


Hour 

FAN l^fAir 

+NAT -tiMAT 


FAN 
+FAN 


FAN NAT 
+NAT+XAT 


f. 


NA 


78 


(■■4 


NA 


11-^ 


00 


9nn ^^9. ma 


■^04 944 S-T^fi 


308 


31 n 


.'^m.. 


R41 


490 '%%'>... 


66R 


R1 R 4(17 


g 


NA 


87 


■u-M '; 


NA 


Y>(j 


U4- 


018 l'^3 l^"-' 


331 96Q 91 s 


436 


340 




500 


473 ^vfi 


730 


5^0 4f;|'> 


10 


NA 


94 


7^ - 


163 


137 


ro 


737 189 174 


357 292 l23f, 


467 


369 


'--im 


638 


519 '3<M- 


787 


617 4S7 


iR 


191 


ins 


m..:... 


18Q 


IRQ 


,14^) 


.97c; 991 -^(111 


416 343 l-'Ti 


■^44 


434 


■Ml.. 


738 


Roo ~m^ 


ons 


718 i53 


20 


131 


118 


'<m '' 


208 


177 


15(1 


305 247 223 


463 383 302 


606 


487 


3f5 


824 


673 -512 


1013 


808 62t. 


30 


145 


137 


\ 1,1?^' 


736 


ivn 


\m 


350 986 757 , 


S.33 446 Uy 


703 


570 


'¥\^ 


958 


700 :«i93.. 


1183 


059 7:- 3 


50 


159 


145 


''"SW' 


268 


233 


20f^ 


406 337 7,9fi . 


622 529 -41 


833 


686 


'"^ 


1139 


954 ^6^'- 


1418 


1157 S3S 


100 


m 


15? 


!,m,, 


2?7 


2W „. 


"NA 


469 398 ImA 


726 633 U-f 


999 


§46 




1?7§ 


\m Ir^-' 


IIM 


1459 y-is 



74 



WATER HEATERS 



Table 5-16 



Table 5-16 Masonry Chimney 



Number of Appliances: 



Appliance Type: 



Appliance Vent Connection: 



Two or More 



Category I 



Type B Double-Wall Connector 



Vent Connector Capacity 

















Type B Double- Wall Vent Connector Diameter - 


-D( 


in.) 












3 


4 


5 


6 


7 


8 


9 


10 


Height Rise 












AppI 


iance 


[nput Rating Limits in 


Thousand 


3 0f Bt 


11 per Hour 












H 


R 


FAN 


MAT 


FAN 


NAT 


FAN 


NAT 


FAN MAT 


FAN 


MAT 


FAN 


NAT 


FAN 


NAI 


FAN NATi 


(ft.) 


(ft.) 


Min 


Max Max' 


Min Max Max 


Min 


Max 


Max 


Min MaxMax 


Min Max 


'M.t^ 


Min 


Max Max 


Min 


Max 


-^Am 


Min MaxMax 


6 


1 


24 


33 


2i ■ 


39 62 


40 


52 


106 


= 67 


65 194 101 


87 


274 


'141 


104 


370 


201 


124 


479 


'253 


145 


599 319 




2 


26 


43 


■M - 


41 79 


32 


53 


133 


,85 


67 230 124 


89 


324 


173 


107 


436 


232 


127 


562 


300 


148 


694 378 




3 


77 


49 


^-- 


42 92 


hi 


55 


155 


'.^ 


69 262 143 


91 


369 


"?m 


109 


491 


270 


129 


633 


'349 


151 


795 4.3'^ 


8 


1 


24 


39 


.22 - 


39 72 


4! 


55 


117 


,m 


71 213 105 


94 


304 


-148 


113 


414 


210 


134 


539 


-2^7 


156 


682 3.3.^ 




2 


26 


47 


29 - 


40 87 


53 


57 


140 


,86 


73 246 127 


97 


350 


■179 


116 


473 


241) 


137 


615 


311- 


160 


776 394 




3 


77 


5? 


m ' 


42 97 


ft2 


59 


159 


'9^ 


75 269 145 


99 


383 


'^im 


119 


517 


27n 


n9 


677 


-W^ 


163 


848 452 


10 


1 


24 


42 


n ' 


38 80 


42 


55 


130 


= n 


74 232 108 


101 


324 


'153 


120 


444 


21f> 


142 


582 


\Tn 


165 


739 34S 




2 


26 


50 


29 , 


40 93 


54 


57 


153 


;87. 


76 261 129 


103 


366 


;i84 


123 


498 


247 


145 


652 


;321 


168 


825 407 




3 


77 


55 


3f? ' 


41 105 


^^3 


58 


170 


'Am 


78 284 148 


106 


397 


•W 


176 


540 


7H1 


147 


705 


'■■■?m 


171 


893 i63 


15 


1 


24 


48 


•n 


38 93 


41 


54 


154 


^74 


72 277 1-14 


100 


384 


'Wk 


125 


511 


229 


1=^3 


658 


;297 


184 


824 375 




2 


25 


55 


■m.'- 


39 105 


55 


56 


174 


•89 


74 299 134 


103 


419 


>192 


128 


558 


260 


1=^6 


718 


;339 


187 


900 432 




3 


26 


59 


~m . 


41 115 


64 


57 


189 


102 


76 319 153 


105 


448 


^215 


131 


597 


2^2 


r^9 


760 


j^?; 


190 


960 48h 


20 


1 


24 


52 


24 ' 


37 102 


46 


53 


172 


\77 


71 313 119' 


98 


437 


:i73 


123 


584 


23^^ 


i=;o 


752 


1312 


180 


943 397 




2 


25 


58 


3t '■ 


39 114 


36 


55 


190 


n 


73 335 138 


101 


467 


-199 


126 


625 


2/11 


133 


805 


'^4 


184 


1011 452 




3 


26 


63 


35 ' 


40 123 


65 


57 


204 


104- 


75 353 157 


104 


493 


'222 


129 


661 


.301 


156 


851 


^^'6 


187 


1067 505 


30 


1 


24 


54 


25 


37 111 


4-S 


52 


192 


S2 


69 357 127 


96 


504 


= 187' 


119 


680 


253 


145 


883 


^=337 


175 


1115 4.32 




2 


25 


60 


3t 


38 122 


5h 


54 


208 


•95 


72 376 145 


99 


531 


,209- 


122 


715 


287 


149 


928 


■31?B- 


179 


1171 4K1 




3 


?6 


64 


^ 


40 131 


h6 


56 


221 


107 


74 392 ,t63 


101 


R54 


'>V\ 


17.5 


746 


317 


I=i7 


968 


''418 


18'' 


1770 535 


50 


1 


23 


51 


m ' 


36 116 


51 


51 


209 


•,m- 


67 405 143 " 


92 


582 


:213 


115 


798 


204 


140 


1049 


:-392 


168 


1334 506 




2 


24 


59 


32 • 


37 127 


61 


53 


225 


m. 


70 421 la 


95 


604 


-235 


118 


827 


126 


143 


1085 


;433 


172 


1379 558 




3 


76 


64 


^ 


39 135 


69 


55 


737 


w^ 


72 435 180 


98 


674 


7m 


121 


854 


'^?1 


147 


1118 


'474 


176 


1421 6J1 


100 


1 


23 


46 


24 


35 108 


50 


49 


208 


'92 , 


65 428 }55- 


88 


640 


237 


109 


907 


334 


134 


1222 


^454 


161 


1589 596 




2 


24 


53 


31' 


37 120 


61) 


51 


224 


105 


67 444 174 


92 


660 


-."Mi 


113 


933 


368 


138 


1253 


= 497 


165 


1626 o5l 




3 


2.5 


59 


■m ' 


38 130 


.,&L.... 


53 


237 


-1,IB 


69 458 ^m 


94 


679 


'm 


11(7 


95(7 


3?9 


141 


1282 


■MO 


lf?9 


1661 7(15 



Common Vent Capacity 





Minimum Internal Area of Masonry Chimney Flue (in.^) 






12 


1 


19 


28 




38 1 50 1 63 1 


78 1 113 




Vent 

Height 
H 
(ft.) 


FAN 
hFAN 


FAN 

-fNAT 


NAT 


Combi 

FAN FAN NAT 

+FAN +NAT-i.NfA'r 


tied Appl 

FAN FAN 

+FAN+NAT 


ianc 

kAT 


e Input Ratin 

IAN FAN mm 

~\ AN +NAT --^-^^AT 


g in Thousar 

FAN FAN MAT. 

+FAN +NAT -t^TAT 


ids of Btu pe 

FAN FAN BiAT 

+FAN +NAT 'ff^i>^t 


r Hour 

FAN FAN NAT 

+FAN +NAT +MA!E' 


FAN FAN 
■fFAN +NAT 


N-\T 

-\-Al 


6 


NA 


74 


■■& 


NA 


119 '46 


NA 178 


■ 71 


\V 257 \\W, 


NA 351 143 , 


NA 458 -188 


NA 


582 246 


1041 853 


.VA 


8 


NA 


80 


28 


NA 


130 53 


NA 193 


82 


W 279 ' -139 


NA 384 .163. 


NA 501 \n& 


724 


636 •.2W 


1144 937 


J.iS 


10 


NA 


84 


S 


NA 


138 56, 


NA 207 


= ,90 


\ \ 299 ; 131 


NA 409 177 


606 538 I'm 


776 


686 .'m.' 


1226 1010 151 


15 


NA 


NA 


■m 


NA 


152 m 


NA 233 


,106' 


W 334 : 152 


523 467 Z12 


682 611 ',2^3 


874 


781 ism 


1374 1156 


54fi 


20 


NA 


NA 


41 


NA 


NA 75 


NA 250 


'122 


\ \ 368 - 172 


565 508 24a 


742 668 imS 


955 


858 [in 


1513 1286 


64*. 


30 


NA 


NA 


I^A 


NA 


NA M4 


NA 270 


= 137 


\ \ 404 im 


615 564 -W^ 


816 747 '-^l. 


10062 


969 '''m$ 


1702 1473 


74g 


50 


NA 


NA 


NA 


NA 


NA NA 


NA NA 


'mk 


\\ NA NA 


NA 620 328 


879 831 461 


1165 


1089 ''606 


1905 1692 


■j;.-* 


100 


NA 


NA 


NA 


NA 


NA MA 


NA NA 


NA 


\\ NA MA 


NA NA '348, 


NA NA ,499 


NA 


NA 1669 


2053 1921 


10 "^fi 



75 



Table 5-1 7 



UNIFORM PLUMBING CODE 



Table 5-17 Masonry Chimney 





















Vent Co 


nned 


Number of Appliances: 


Two or 


More 










Appliance Type: 


Category I 




Appliance Vent Connection: 


Single 


■Wall Metal Connector 




or Capacity 
























Dnnector 












Single- Wall Metal Vent Connector Diameter 


— D (in.) 
















3 


1 




4 




5 


i 




6 


\ 




7 


! 




8 


1 




9 


i 




in 




VentC 












Appliance 


Input Rating Limits 


in Thousands of Btu 


per Hour 












Height 


Rise 






'"'~' 














\ 


\ 






"" ; 




















H 


R 

(ft.) 


FAN 


NAT 
'Msx. 


FAN NAT 
Min Max Max 


FAN 
Min Max 


NAT 
■ Max 


FAN ^A1' 
Min Max is&K ' 


FAN 
Min Max 


NAT, 


FAN 
Min Max 


\A r 


FAN 
Min Max 


NAT 
Max 


FAN f 
Min Max, 


V.A1 


(ft.) 


Min 


Max 


.Vlcix 


6 


1 


NA 


NA 


'Ml 


NA 


NA 3f 


NA 


NA 


. 66 


179 


191 * 


100 


231 


271 


140' 


292 


366 


21m 


362 


474 


252 


499 


594 


316 




2 


NA 


NA 


.28 


NA 


NA 52 


NA 


NA 


$4 


186 


227 \ 


123' 


239 


321 


172: 


301 


432 


23) 


373 


557 


299 


509 


696 


376 




3 


NA 


NA 


134, 


NA 


NA 61 


134 


153 


97 


193 


258 1142 S 


247 


365 


;202; 


309 


491 


269 


381 


634 


348 


519 


793 


137 


8 


1 


NA 


NA 


Ml 


NA 


NA 40 


NA 


NA 


■,68 


195 


208 s 


103 


250 


298 


= 146: 


313 


407 


207 


387 


530 


263 


529 


672 


y^ 




2 


NA 


NA 


^28 


NA 


NA 52 


137 


139 


m 


202 


240 ! 


125 


258 


343 


^-177 i 


323 


465 


23S 


397 


607 


309 


540 


766 


3«1 




3 


NA 


NA 


34 


NA 


NA 62 


143 


156 


.9S 


210 


264 i 


145 


266 


376 


.205- 


332 


509 


274 


407 


663 


356 


551 


838 


451 ) 


10 


1 


NA 


NA 


'22 


NA 


NA 41 


130 


151 


70 


202 


225 i 


106 


267 


316 


= 151 - 


333 


434 


213 


410 


571 


273 


558 


727 


-r. 




2 


NA 


NA 


'29 


NA 


NA-53 


136 


150 


86 


210 


255 


128 


276 


358 


.181, 


343 


489 


241 


420 


640 


317 


569 


813 


401 




3 


NA 


NA 


'34 


97 


102 62 


143 


166 


99- 


217 


277 


i47 


284 


389 


207! 


352 


530 


279 


430 


694 


363 


580 


880 


'159 


15 


1 


NA 


NA 


-23 


NA 


NA 43 


129 


151 


73 


199 


271 


112 


268 


376 


-161; 


349 


502 


22=5 


445 


646 


291 


623 


808 


lh6 




2 


NA 


NA 


;30 


92 


103 54, 


135 


170 


88 -. 


207 


295 


132' 


177 


411 


!189| 


359 


548 


2=5c. 


456 


706 


334 


634 


884 


424 




3 


NA 


NA 


\U 


96 


112 63 


141 


185 


,101 


215 


315 151 


286 


439 


213; 


368 


586 


2S'J 


466 


755 


378 


646 


945 


'179 


20 


1 


NA 


NA 


m 


87 


99 45 


128 


167 


76, 


197 


303 


117 


265 


425 


169 1 


345 


569 


235 


439 


734 


306 


614 


921 


387 




2 


NA 


NA 


,m. 


91 


111 -m 


134 


185 


90, 


205 


325 ; 


136 


274 


455 


195 >, 


355 


610 


26^ 


450 


787 


348 


627 


986 


44-^ 




3 


NA 


NA 


■■■m 


' 96 


119 'U 


140 


199 


103- 


213 


343 |154 


282 


481 


219! 


365 


644 


2wf^ 


461 


831 


391 


639 


1042 


496 


30 


1 


NA 


NA 


i24 


86 


108 47 


126 


187 


80 


193 


347 ! 


124 


259 


492 


-183! 


338 


665 


250 


430 


864 


330 


600 


1089 


421 




2 


NA 


NA 


;3r 


91 


119 ,5:^ 


132 


203 


- 93,' 


201 


366 \ 


142 


269 


518 


■■205 ; 


348 


699 


282 


442 


908 


372 


613 


1145 


47."5 




3 


NA 


NA 


-?5 


95 


127 65 


138 


216 


-^m- 


209 


381 il60- 


277 


540 


:ffi9' 


358 


729 


312 


452 


946 


412 


626 


1193 


.-^24 


50 


1 


NA 


NA 


;24 


85 


113 50 


124 


204 


,87- 


188 


392 ^ 


139' 


252 


567 


;208 


328 


778 


2h7 


417 


1022 383 


582 


1302 


492 




2 


NA 


NA 


31 


■ 89 


123 '60 


130 


218 


im 


196 


408 ' 


158 


262 


588 


;230; 


339 


806 


:.2i! 


429 


1058 425 


596 


1346 


545 




3 


NA 


NA 


= 35 


. 94 


131 68 


136 


231 


'112: 


205 


422 


176 = 


271 


607 


255 


349 


831 


351 


440 


1090 466 


610 


1386 


597 


100 


1 


NA 


NA 


m 


84 


104 49 


122 


200 


■ 89 = 


182 


410 


151 


243 


617 


232 


315 


875 


328 


402 


1181 444 


560 


1537 


5H\) 




2 


NA 


NA 


'30' 


' 88 


115 59 


127 


215 


102 s 


190 


425 


169 


253 


636 


254; 


326 


899 


361 


415 


1210 488 


575 


1570 


oil 




3 


NA 


NA 


:34 


■ 93 


124 67 


133 


228 


■M5 


199 


438 , 


188. 


262 


654 


-279^ 


337 


921 


342 


427 


1238 529 


589 


1604 


p87 



Common Vent Capacity 















Minimum Internal Area of Masonry Chimney Flue (in. 













12 






19 


28 




38 


i 50 ! 


63 


78 


113 




Vent 
Height 

H 


FAN FAN 
+FAN +NAT 


:NAt': 

!*NA1^ 


FAN 

tFAN 


FAN mt 

+NAT*MAf 


Combined Appliance Input Rating in Thousands of Btu per Hour 

FAN FAN MATi FAN FAN IKTST'; FAN FAN Mf; FAN FAN MAT FAN FAN NAT 
4.FAN+NAT +NAT- +FAN +NAT !+NAli +FAN +NAT+MAT+FAN +NAT ^NAt +FAN+NAT+MAT 


FAN FAN 
tFAN+NAT 


t-MAT ■ 


6 


NA 


NA 


= 25 ' 


NA 


118 45 '■ 


NA 


17671 


NA 


255 


\ 102 NA 


348 142 \ NA 


455 '187 NA 


579 245 


NA 846 


■NA ; 


8 


NA 


NA 


\ 28 • 


NA 


128 -52 ■ 


NA 


19081 


NA 


276 


l-lis; NA 


380 162 = NA 


497 217- NA 


633 277 


1136 928 


\^m ■■ 


10 


NA 


NA 


! 31-, 


NA 


136 -56 . 


NA 


20589 " NA 


295 


!'l29; NA 


405 175 • NA 


532 234' 771 


680 300 


1216 1000 


450 ■ 


15 


NA 


NA 


\:u\ 


NA 


NA '66' 


NA 


2361IB ! NA 


335 


;150: NA 


400 210 ■ 677 


602 ;280- 866 


772 360 


1359 1139 


:540 : 


20 


NA 


NA 


:NA' 


NA 


NA 74 


NA 


247120 i NA 


362 


i 170 NA 


503 240 ' 765 


661 ,321- 947 


849 415 


1495 1264 


mo ; 


30 


NA 


NA 


:NA. 


NA 


NA NA 


NA 


NA135 ■ NA 


398 


195 NA 


558 275 808 


739 '377' 1052 


957 490 


1682 1447 


7m ' 


50 


NA 


NA 


!ma 


NA 


NA na; 


NA 


NANA- NA 


NA 


NA NA 


612 325 . NA 


821 '456; 1152 


1076 sm 


1879 1672 


,910 \ 


100 


NA 


NA 


mh 


NA 


NAMA^ 


NA 


nana: NA 


NA 


M.d NA 


NA KA ; NA 


NA 'm NA 


NA 6^ 


20061885 


\m 



76 



WATER HEATERS 



Table 5-18 



Table 5-18 Single- Wall Metal Pipe or Type B Asbestos Cement Vent 



Number of Appliances: 


Two or More 


Appliance Type: 


Draft-Hood-Equipped 


Appliance Vent Connection: 


Direct to Pipe or Vent 



Vent Connector Capacity 



Total Vent Height 
ifD 



Connector 
Rise 

_(fy 



Vent Connector Diameter - D (in.) 



Maximum Appliance Input Rating in Thousands of Btu per Hour 



6-8 



21 
28 



40 

53 



68 
86 



102 
124 



146 
178 



205 
235 





3 


34 


61 


98 


147 


204 


275 




1 


23 


44 


n 


117 


179 


240 


15 


2 


30 


56 


92 


134 


194 


265 




3 


35 


64 


102 


155 


216 


298 




1 


25 


49 


84 


129 


190 


270 


30 


2 


31 


58 


97 


145 


211 


295 


and up 


3 


36 


68 


107 


164 


232 


321 



Common Vent Capacity 



Total Vent Height 



10 
15 
20 
30 
50 



Common Vent Diameter - D (in.) 



10 



12 



48 


78 


111 


155 


205 


320 


NA 


55 


89 


128 


175 


234 


365 


505 


59 


95 


136 


190 


250 


395 


560 


71 


115 


168 


228 


305 


480 


690 


80 


129 


186 


260 


340 


550 


790 


NA 


147 


215 


300 


400 


650 


940 


NA 


NA 


NA 


360 


490 


810 


1190 



77 



Table 5-19 



UNIFORM PLUMBING CODE 



Table 5-19 Exterior Masonry Chimney 



Special Use: 



Minimum Allowable Input Rating of Space-Heating Appliance 
in Thousands of Btu per Hour 



Number of Appliances: 


Single 


Appliance Type: 


NAT 


Appliance Vent Connection: 


Type B Double- Wall Connector 



Vent Height 

(ft.) 12 



19 



Internal Area of Chimney (Square Inches) 
28 38 50 63 78 



113 



37°F or greater 






Local 99% winter design temperature: 


37°F or 


greater 




6 


























8 


























10 


























15 


NA 























20 


NA 


NA 


123 


190 


249 


184 








30 


NA 


NA 


NA 


NA 


NA 


393 


334 





50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


579 


27°F to 36°F 






Local 99% Winter Design Temperature: 27°F to 36°F 




6 








68 


116 


156 


180 


212 


266 


8 








82 


127 


167 


187 


214 


263 


10 





51 


97 


141 


183 


201 


225 


265 


15 


NA 


NA 


NA 


NA 


233 


253 


274 


305 


20 


NA 


NA 


NA 


NA 


NA 


307 


330 


362 


30 


NA 


NA 


NA 


NA 


NA 


419 


445 


485 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


763 


17°F 1 26°F 






Local 99% Winter Design Temperature: 17°F to 26°F 




6 


NA 


NA 


NA 


NA 


NA 


215 


259 


349 


8 


NA 


NA 


NA 


NA 


197 


226 


264 


352 


10 


NA 


NA 


NA 


NA 


214 


245 


278 


358 


15 


NA 


NA 


NA 


NA 


NA 


296 


331 


398 


20 


NA 


NA 


NA 


NA 


NA 


352 


387 


457 


30 


NA 


NA 


NA 


NA 


NA 


NA 


507 


581 


50 ' 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 








Local 99% Winter Design Temperature: 5°F to 16°F 




6 


NA 


NA 


NA 


■ NA 


NA 


NA 


NA 


416 


8 


NA 


NA 


NA 


NA 


NA 


NA 


312 


423 


10 


NA 


NA 


NA 


NA 


NA 


289 


331 


430 


15 


NA 


NA 


NA 


NA 


NA 


NA 


393 


485 


20 


NA 


NA 


NA 


NA 


NA 


NA 


450 


547 


30 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


682 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


972 








Local 99% Winter Design Temperature: -10°F to 4°F 




6 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


484 


8 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


494 


10 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


513 


15 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


586 


20 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


650 


30 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


805 


50 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


1003 



-11°F or Lower 



Local 99% Winter Design Temperature: -11°F or Lower 
Not recommended for any vent configurations 



78 



WATER HEATERS 



Table 5-20 



Table 5-20(a) Exterior Masonry Chimney 



Special 


Use: 






Combined 


Appliance Maximum Input Rating in 


Thousands of Btu per 


Hour 




Number of 


Applications: 






Two 


or More 










Appliance 


Type: 








NAT 


+ NAT 










Appliance 


Vent Connection: 






Type 


B Double-Wall Connector 




Vent 




Internal Area of Chimney (Square Inches) 


Height 
(ftl 




12 




19 


28 


38 




50 


63 


78 


113 


6 






25 




46 


71 


103 




143 


188 


246 


NA 


8 






28 




53 


82 


119 




163 


218 


278 


408 


10 






31 




56 


90 


131 




177 


236 


302 


454 


15 






NA 




67 


106 


152 




212 


283 


365 


546 


20 






NA 




NA 


NA 


NA 




NA 


325 


419 


648 


30 






NA 




NA 


NA 


NA 




NA 


NA 


496 


749 


50 






NA 




NA 


NA 


NA 




NA 


NA 


NA 


922 


100 






NA 




NA 


NA 


NA 




NA 


NA 


NA 


NA 



Table 5-20(b) Exterior Masonry Chimney 



Special Use: 






Combined Appliance 


Maximum Input Rating in 


Thousands of Btu per 


Hour 


Number of 


Applications: 






Two ( 


3r More 








Appliance 


Type: 








NAT 


+ NAT 








Appliance 


Vent Connection: 






Type 


B Double-Wall Connector 






Vent 


Internal Area of Chimney (Square Inches) 


Height 
(ft) 


12 




19 


28 


38 




50 


63 


78 


113 


37°F or Greater 








Local 99% Winter Design Temperature: 
37°F or Greater 








6 



























NA 


8 






























10 






























15 


NA 



























20 


NA 




NA 


NA 


NA 




NA 


184 








30 


NA 




NA 


NA 


NA 




NA 


393 


334 





50 


NA 




NA 


NA 


NA 




NA 


NA 


NA 


579 


100 


NA 




NA 


NA 


NA 




NA 


NA 


NA 


NA 


27°F to 36T 








Local 99% Winter Design Temperature: 


















27°F to 36°F 










6 










68 


NA 




NA 


180 


212 


NA 


8 










82 


NA 




NA 


187 


214 


263 


10 







51 


NA 


NA 




NA 


201 


225 


265 


15 


NA 




NA 


NA 


NA 




NA 


253 


274 


305 


20 


NA 




NA 


NA 


NA 




NA 


307 


330 


362 


30 


NA 




NA 


NA 


NA 




NA 


NA 


445 


485 


50 


NA 




NA 


NA 


NA 




NA 


NA 


NA 


763 


100 


NA 




NA 


NA 


NA 




NA 


NA 


NA 


NA 



79 



Table 5-20(b) Continued 



UNIFORM PLUMBING CODE 



F to 26°F 






6 


NA 


NA 


8 


NA 


NA 


10 


NA 


NA 


15 


NA 


NA 


20 


NA 


NA 


30 


NA 


NA 


50 


NA 


NA 


100 


NA 


NA 



Local99% Winter Design Temperature 
17 to 26°F 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 



NA 


NA 


264 


352 


278 


358 


331 


398 


387 


457 


NA 


581 


NA 


862 


NA 


NA 



6 


NA 


8 


NA 


10 


NA 


15 


NA 


20 


NA 


30 


NA 


50 


NA 


100 


NA 


4°F or Lower 





NA 
NA 
NA 
NA 
NA 
NA 
NA 
NA 



Local 99% Winter Design Temperature 
5 to 16°F 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

NA NA NA NA 

Local 99% Winter Design Temperature 

4°F or Lower 
Not recommended for any vent configuration 



NA 


NA 


NA 


NA 


NA 


430 


NA 


485 


NA 


547 


NA 


682 


NA 


NA 


NA 


NA 



Table 5-21(a) Exterior Masonry Chimney 



Special Use: 




Combined Appliance Maximum Input Rating in 


Thousand of Btu 


per Hour 


Number of Applications: 






Two 


or More 








Appliance Type: 






FAN 


+ NAT 








Vent 




















Height 






Internal Area of 


Chimney (Square Inches) 








H 

(ft.) 


12 


19 


28 


38 




50 


63 


78 


113 


6 


74 


119 


178 


257 




351 


458 


582 


853 


8 


80 


130 


193 


279 




384 


501 


636 


937 


10 


84 


138 


207 


299 




409 


538 


686 


1010 


15 


NA 


152 


233 


334 




467 


611 


781 


1156 


20 


NA 


NA 


250 


368 




508 


668 


858 


1286 


30 


NA 


NA 


NA 


404 




564 


747 


969 


1473 


50 


NA 


NA 


NA 


NA 




NA 


831 


1089 


1692 


100 


NA 


NA 


NA 


NA 




NA 


NA 


NA 


1921 



80 



WATER HEATERS 



Table 5-21(b) Exterior Masonry Chimney 



Special Use: 



Minimum Allowable Input Rating of Space-Heating Appliance in 
Thousands of Btu per Hour 



Number of Applications: 


Two or More 


Appliance Type: 


NAT + NAT 


Appliance Vent Connection: 


Type B Double- Wall Connector 



Vent 






Internal Area of Chimney (S quart 


! Inches) 






Height 


















(ft.) 


12 


19 


28 


38 


50 


63 


78 


113 


37°F or greater 






Local 99% Winter Design Temperature: 














37°F or Greater 








6 


























8 


























10 


























15 


NA 























20 


NA 


NA 


123 


190 


249 


184 








30 


NA 


NA 


NA 


334 


398 


393 


334 





50 


NA 


NA 


NA 


NA 


NA 


714 


707 


579 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


1600 


27°F to 36°F 






Local 99% Winter Design Temperature: 














27°F to 36°F 










6 








68 


116 


156 


180 


212 


266 


8 








82 


127 


167 


187 


214 


263 


10 





51 


97 


141 


183 


210 


225 


265 


15 


NA 


111 


142 


183 


233 


253 


274 


305 


20 


NA 


NA 


187 


230 


284 


307 


330 


362 


30 


NA 


NA 


NA 


330 


319 


419 


445 


485 


50 


NA 


NA 


NA 


NA 


NA 


672 


705 


763 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


1554 


17°F TO 26°F 






Local 99% Winter Design Temperature: 














irF to 26°F 










6 





55 


99 


141 


182 


215 


259 


349 


8 


52 


74 


111 


154 


197 


226 


264 


352 


10 


NA 


90 


125 


169 


214 


245 


278 


358 


15 


NA 


NA 


167 


212 


263 


296 


331 


398 


20 


NA 


NA 


212 


258 


316 


352 


387 


457 


30 


NA 


NA 


NA 


362 


429 


470 


507 


581 


50 


NA 


NA 


NA 


NA 


NA 


723 


766 


862 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


1669 


5°F TO 16°F 






Local 99% Winter Design Temperature: 














5°F to 16°F 










6 


NA 


78 


121 


166 


214 


252 


301 


416 


8 


NA 


94 


135 


182 


230 


269 


312 


423 


10 


NA 


111 


149 


198 


250 


289 


331 


430 


15 


NA 


NA 


193 


247 


305 


346 


393 


485 


20 


NA 


NA 


NA 


293 


360 


408 


450 


682 


30 


NA 


NA 


NA 


377 


450 


531 


580 


682 


50 


NA 


NA 


NA 


NA 


NA 


797 


853 


972 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


1833 


-10°F to 4°F 






Local 99% Winter Design Temperature 














-10°F to 4°F 










6 


NA 


NA 


145 


196 


249 


296 


349 


484 


8 


NA 


NA 


159 


213 


269 


320 


371 


494 


10 


NA 


NA 


175 


231 


292 


339 


397 


513 


15 


NA 


NA 


NA 


283 


351 


404 


457 


586 


20 


NA 


NA 


NA 


333 


408 


468 


528 


650 


30 


NA 


NA 


NA 


NA 


NA 


603 


667 


805 


50 


NA 


NA 


NA 


NA 


NA 


NA 


955 


1003 


100 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


NA 


-11°F or Lower 






Local 99% Winter Design Temperature: 














-11°F or Lower 
















Not recommended for any vent configurations 







81 



Figure G.1 (a)- G.I (d) 



UNIFORM PLUMBING CODE 



PART II 

This is originally from NFPA 54, 
which contains additional references. 

Sizing of Venting Systems Serving Appliances 
Equipped with Draft Hoods, Category I 
Appliances, and Appliances Listed for Use 
with Type B Vents 



ure G.l <a) through Figure G.1 (a). 



Veni 








1" l--^- ■ 










i^ 


\ 


H 


r 

type B dmit^cHftiaN /^ 
gas vwi used as-*-/ 


i 


1 






T 

D 








M 


A 


\ 




c 


Sk 

— ^ 








t — 






1 





gas vent txmm^ei <flf©e%,, to *» ^^iarscs. 

NofB;Tl» &pfMsit«^ can bs eWw CsJa^fy I draft 
h0c^-eiiuft^>ed or ten-^stetecl tj^. 

mm^tiA^mmxvtmk a l^pe B tkmhU^VMi Vent, 



TOfe 5-11 is used wh«n sWngsType B (JouMs-vraJI gas 
vem co*sn©a>f sttad^ lo « «»^rad masonry (*lmjjey. 

Notes: 

1. Afethaeqi^^ief^cross-sgoMonal arsa of tt»«le finer. 

2. The ap^am^ can t>e eHJw Category ! ^fiift 
hKKKlHstiiuij^iedi or to^a^ststed j^. 

MGtlREG.Kc^ 1fotS)^^^aSar^a^i^eA{^plia«cewtha 








f 




■ 




Ttfe-ilned masonry — ». 
chimney 








h i-~- 


H 


^ 


1 




1 








S»sgfe-¥»all — »• ■ 
v«M connector 











ig 


i 


A 








— 








L. 





rms S«10 fg tmd ««fi^ {^2l«^ a ^!e-i«^ ms^l 

v@nt comector att^isd to 8 Type B tkHitdcHV')^! £^ vsnt 

Met©: 11^ m^^(^ <san be (Sitter Crti^fwy I drrtt 
hQod>«c){i^£«d or ta-as^sfsd type. 

FIGimEG.ia>> 'iyi*«BDoitt>i&-^«yiVoatSptemServ%j 
Sli^e Apf^Oaace iddi a ^a^e.¥M Metal Vest Ccmnectoc 



TaWe 5-1 2 fe ussd wties so^ng a sJi^e-wail vpt 
coftiHSSor attached tt> a tte'Bfwd tTiitswry (^mn^. 

Notes: 

1. Afe the ec|s«vatem cfmrn-mtMeml area of !h© ese Bnsr: 

2. T*e appUeiai^ can to el»w Cate^ry I draft 
hood-si^pised or ten«iEissis$ed te^e. 

WtGWOLGAid) Y&^^^esmS&r^&Sk^Ap^&mseiam^: 
■.:aMmmry€Mmmefm&» ^a^Vm MetaT^ CoQaeceen 



82 



WATER HEATERS 



Figure G.1(e)-G.1(h) 



{ ^ •*--V^irtt cap 




Asbestos cenwflt 1Vp« B or «lf^leM(»aB metat vent 



WiG%ME G4(e) Asbesios Cemmt Ty^ B or 
M«(at Vent System ServiB^ a Siit|^ JCIrai^ H«od>£qal|^ed 



-Vert cap 



comTKHivent 







Tat^ S'^5is used vi^i^ sizing sIngta-waU vent 
<;»nrte«toiB attac^ten;! to a Type cbu^a^waH 
coimmmvant 

Nota: iach ap0lanoa can ba «nherCa^g^ i draft 

FIGURE G.l(g) V«i» S;irsU!ta Scm^ Two or Mow App^ 
ances widn Tfpe B l>otthle-mU V«3it sapi4 Sin|;i«-Vliyi Metal 
VtsBX Coxtaectom. 



Vent cap 




Table S-1 Is mod wtisn ^zfeg T^ B d<Hitte*wa!! 
^s \%nt cemn9tft(»s attashad to a Type B 
(iouli^-walt wmiwn varft. 

I^a: Eac^ apptfaiKa» can ba althsr Category I etralt 
hood-«(|ul(^3«d or lan-asststad typa. 

with lype B Doat>le»^«Mi Veat and l^pe B I>oal>l«-\W\)^ 
CofUtectoi^. 



TiMnad ma^jniy 




Tabte S-12 fs used when slzfat^tyf^ B «k»ibta*waB vant 
c<»inectom attadtod to a tMinad maacMwy d^inay. 

Nistas: 

1 . >l ta t^w aquNalant «3xsa«9acMonal area of a» tile nnar. 

2. Eacli ai^laynce ce^ t>a afthar Category ) c^iaf^ 
hood-aqptp^ed <»' ian-assistad type. 

fIGUIt£G.I{h> MasotnyCMmtefSesrvio^tWoorMofe 
i^Uaoces iddn l^pa B &oiibl«>li¥^ "V^t Connectors. 



83 



UNIFORM PLUMBING CODE 



oofwiec*or 



\^ 



Ti0-Sn«t ina;^3rHy 







fiseB 



TaWe 5-17 is used when sizing singte-wali metaf vent 
connectors attached to a aie-iiR^ i 



1. AlsMe equivalent cff^^ecttona! area of the ttte (irier. 

2, Ea'^' apfrtiance cair! be eitheriCategofy I draft 
hood-eqtspped or fen-assisted type. 

MGl}B£ G.l <i) MascHOtj Chimn^ Servli^ Two or More 
j^pilances wittt Sixi^'e-I^ Metal %at Coimectois. 



Manifold common 
\«nla>rwectof ^ 



.h*^ 



i«- 



TT^ 



I «, 



C^neetors 



Example: Mahife^d common wnt connector L« can 
t>e no greater tlian 18 Bmes the oammcm vent connector 
manifold inside diameter; ttiat is, a 4 tn. (1 (to mm) InsitJe 
diameter commtm vent connectwmartifold should not 

BxseM 72 in, (i^ mm) in \mi^. 

Note: This is an iilustmtion of a t^ieal maniMJed wnl 
connected'. Different appiiancSjVant ocmnector, or 
comnfkm vent t^pes ar«;po^Wa. 

MGUEEG.l<k) Useof2lifamf(MhMCofnfflcmVmtCkmii^4^r. 



Vertical 




>«^ba$tc^ eemerit Type B. m slngle-wi^l metel Nps vent: 

serving t^m mmsm dmft: hood^quipped appiark^ei. 

MGWXE G.1 (j) Asbestos Cemiraat Tppe B or Sin^e^^t^yi Metal 
Tent System Servtag IVvo or Mdre Draft Hood>E<|ti^pped Aip- 



13,2.5. 



Common vent 



^Lq- 



n 



J-*— Vent cap 



K 



1 4 



Bwnple; Oftsat ccwtmcn veni 

fi|[ote:Ttil8 is an illustratiwi of a lyj^i offset v®rvt. 
t^rerrt aypp^nce, v«it connisffitof, or wsrrt t^s i 



BGUBiE G.l 0) t!te of Ofifeet CkHnmoii Vimt. 



84 



WATER HEATERS 



G.1.1 Example 1: Single Draft-Hood-Equipped 
Appliance. An installer has a 120,000-Btu/h input 
appliance with a 5 in. diameter draft hood outlet that 
needs to be vented into a 10 ft high Type B vent 
system. What size vent should be used assuming (1) 
a 5 ft lateral single-wall metal vent connector is used 
with two 90 degree elbows or (2) a 5 ft lateral single- 
wall metal vent connector is used with three 90 
degree elbows in the vent system? See Figure G.1.1. 

Solution 

Table 5-10 should be used to solve this problem 
because single-wall metal vent connectors are being 
used with a Type B vent, as follows: 

(1) Read down the first column in Table 5-10 until the 
row associated with a 10 ft height and 5 ft lateral 
is found. Read across this row until a vent 
capacity greater than 120,000 Btu/h is located in 
the shaded columns labeled NAT Max for 
draft-hood-equipped appliances. In this 
case, a 5 in. diameter vent has a capacity of 
122,000 Btu/h and can be used for this 
application. 

(2) If three 90 degree elbows are used in the vent 
system, the maximum vent capacity listed in the 
tables must be reduced by 10 percent (see NFPA 
54:13.1.3). This implies that the 5 in. diameter 
vent has an adjusted capacity of only 110,000 



Verit &}me&ot Tm 



Common vent stze 
based on al! Inputs 
entering this segment 
and avaiJatte total height 




Avaiaye ktt^ 
halgW WequaJs 
rtffls pim distance 



Tcrtai input 






± 



Input 



mm. 1 

coflnector T 
Sim if I 

necessary Other Inputs 
tmm bel<m 



Vent connector size 



Common verrt size 



* teptrt • CwnMnsd ^puts 

* Ris« • Awail3bi6 total height M 

* AvaSabte: total height H * Table 5.9 common 

* Tabte S;9 conniector*' v»nt 

HGUEE G, I {m} Mmmtury Gas Vmi Bestfu ¥mt«4w» for 
JEach'Sejpnietti of Systenn. 



Btu/h. In this case, the vent system must be 
increased to 6 in. in diameter. See the following 
calculations: 

122,000 X 0.90 = 110,000 for 5 in. vent 
From Table 5-10, select 6 in. vent. 
186,000 X 0.90 = 167,000 

This figure is greater than the required 
120,000. Therefore, use a 6 in. vent and 
connector where three elbows are used. 

G.1.2. Example 2: Single Fan-Assisted Appliance. 
An installer has an 80,000 Btu/h input fan-assisted 
appliance that must be installed using 10 ft of lateral 
connector attached to a 30 ft high Type B vent. Two 
90 degree elbows are needed for the installation. 
Can a single-wall metal vent connector be used for 
this application? See Figure G.1.2. 

Solution 

Table 5-10 refers to the use of single- wall metal vent 
connectors with Type B vent. In the first column 
find the row associated with a 30 ft height and a 10 ft 
lateral. Read across this row, looking at the FAN 



Use JntSfvldaal vmi for iop-floor 
appliance sf cmn^aor 
fequtomens fer fim or total 



U^ avaltaWe tot^ 

apsiianos and 
<i(mUtm4 input ol 
al! ^pffiansBS ott 
comm<m <^nt 








ThW-flaor • 



Avallato toW 



H 



Rr8t4loor» 



TWrd WertonneoHsn t^* 

Av«^laKs toial tteIgM 
Cor ttiW-Roor appfiarsje 
snsf c^xiibkm Inert oJ 



(H top-ftoat «ip|>Hanc« 
Is mi cmnmA&i, 
measure total 
height to vent fop) 

Sscofsd intereonnetaioni 



Use avaaiaKa tola! 
_telght tor second-flow 

Hmt input of two 



First jnteftsnnsciofi im' 



D^grs v^t owinsctof tor 
first-floor app}lafl« as. an 
Individual vent oC thJs lotaS 
WgW for Input of fffst- 






♦ Eacft interoonnactiofs %m Is sartse st» as 
sggmf nt of common wni rflreoi^ $kKm 



SIGURE:G.l|sji Prifldples of lte%a of Multistoiry Y&m 
Vmxg Veat Cknmector aad Coottmon Vent Di^iga IkMes. 



85 



G.1.2-G.2.1 



UNIFORM PLUMBING CODE 



Min and FAN Max columns, to find that a 3 in. 
diameter single-wall metal vent connector is not 
recommended. Moving to the next larger size single- 
wall connector (4 in.), we find that a 4 in. diameter 
single-wall metal connector has a recommended 
maximum vent capacity of 144,000 Btu/h. The 
80,000 Btu/h fan-assisted appliance is outside this 
range, so the conclusion is that a single-wall metal 
connector could be used to vent the appliance. Table 
5-10 shows the acceptable range of vent capacities for 
a 4 in. vent with 5 ft of lateral to be between 72,000 
Btu/h and 157,000 Btu/h. 

If the appliance cannot be moved closer to the 
vertical vent, then a Type B vent could be used as the 
connector material. In this case. Table 5-9 shows 
that, for a 30 ft high vent with 10 ft of lateral, the 
acceptable range of vent capacities for a 4 in. 
diameter vent attached to a fan-assisted appliance is 
between 37,000 Btu/h and 150,000 Btu/h. 

G.1.3. Example 3: Interpolating Between Table 
Values. An installer has an 80,000 Btu/h input 
appliance with a 4 in. diameter draft hood outlet that 
needs to be vented into a 12 ft high Type B. Can this 
appliance be vented using a 4 in. diameter vent? 

Solution 

Table 5-9 is used in the case of an all Type B Vent 
system. However, since there is no entry in Table 5-9 
for a height of 12 ft, interpolation must be used. 
Read down the 4 in. diameter NAT Max column to 
the row associated with a 10 ft height and 5 ft lateral 
to find the capacity value of 77,000 Btu/h. Read 
further down to the 15 ft height, 5 ft lateral row to 
find the capacity value of 87,000 Btu/h. The 
difference between the 15 ft height capacity value 
and the 10 ft height capacity value is 10,000 Btu/h. 
The capacity for a vent system with a 12 ft height is 
equal to the capacity for a 10 ft height plus 2/5 of the 
difference between the 10 ft and 15 ft height values, 
or 77,000 + 2/5 x 10,000 = 81,000 Btu/h. Therefore, a 
4 in. diameter vent can be used in the installation. 

G.2 Examples Using Common Venting Tables. 

G.2.1 Example 4: Common Venting Two Draft- 
Hood-Equipped Appliances. A 35,000-Btu/h water 
heater is to be common vented with a 150,000 Btu/h 
furnace, using a common vent with a total height of 
30 ft. The connector rise is 2 ft for the water heater 
with a horizontal length of 4 ft The connector rise for 
the furnace is 3 ft with a horizontal length of 8 ft 
.Assume single-wall metal connectors will be used 
with Type B vent. What size connectors and 
combined vent should be used in this installation? 



Types 
gasvem 



Elbow 




Draft hood- 



Fdr Si units. 1 ft « 0.305 m. 
FIGUItE G.1.I Single Draft HoottEqidcpped Ajipibfic^ 




R>r SI ufiife; 1 ttasO.SCS fB. 



30ft 



r Combine<J capacity 

35,000+ 150,0(K) = 
18S.CH)0 Btalhr 



Type B double- 
wait aas \wjt 




Single-waU 
connectors 



iSmft hoocl^ 

-squlpped ' 
*at6r hsatsr 
.35,000'BtJ^r 



Draft hood- 



150,000 Btu/hr 
Input 






86 



WATER HEATERS 



G.2.1 -G.2.2 



See Figure G.2.1. 

Solution 

Table 5-15 should be used to size single-wall 
metal vent connectors attached to Type B vertical 
vents. In the Vent Connector Capacity portion of 
Table 5-15, find the row associated with a 30 ft vent 
height. For a 2 ft rise on the vent connector for the 
water heater, read the shaded columns for draft- 
hood-equipped appliances to find that a 3 in. 
diameter vent connector has a capacity of 37,000 
Btu/h. Therefore, a 3 in. single-wall metal vent 
connector can be used with the water heater. For a 
draft-hood-equipped furnace with a 3 ft rise, read 
across the appropriate row to find that a 5 in. 
diameter vent connector has a maximum capacity of 
120,000 Btu/h (which is too small for the furnace), 
and a 6 in. diameter vent connector has a maximum 
vent capacity of 172,000 Btu/h. Therefore, a 6 in. 
diameter vent connector should be used with the 
150,000 Btu per h furnace. Since both vent connector 
horizontal lengths are less than the maximum 
lengths listed in Table 5-8, the table values can be 
used without adjustments. 

In the Common Vent Capacity portion of Table 
5-15, find the row associated with a 30 ft vent height 
and read over to the NAT + NAT portion of the 6 in. 
diameter column to find a maximum combined 
capacity of 257,000 Btu/h. Since the two appliances 
total only 185,000 Btu/h, a 6 in. common vent can be 
used. 

G.2.2 Example 5 (a): Common Venting a Draft- 
Hood-Equipped Water Heater with a Fan-Assisted 
Furnace into a Type B Vent. In this case, a 35,000- 
Btu/h input draft-hood-equipped water heater with a 
4 in. diameter draft hood outlet, 2 ft of connector rise, 
and 4 ft of horizontal length is to be common vented 
with a 100,000 Btu/h fan-assisted furnace with a 4 in. 
diameter flue collar, 3 ft of connector rise, and 6 ft of 
horizontal length. The common vent consists of a 30 
ft height of Type B vent. What are the recommended 
vent diameters for each connector and the common 
vent? The installer would like to use a single-wall 
metal vent connector. See Figure G.2.2. 

Solution (See Table 5-15) 

Water Heater Vent Connector Diameter. Since 
the water heater vent connector horizontal length of 
4 ft is less than the maximum value listed in Table 5- 
15, the venting table values can be used without 
adjustment. Using the Vent Connector Capacity 
portion of Table 5-15, read down the Total Vent 
Height (H) column to 30 ft and read across the 2 ft 
Connector Rise (R) row to the first Btu/h rating in 
the NAT Max column that is equal to or greater than 



Combined c^sadty 
3S,»Q + 100,000 a 
13S,0W) BSui/hf 



Typs 8 




For Sf mm, IOOO: Btu/hr = 0.2§3 kW, 1 ft = 0.305 m. 

FIGUIME G.2J C»BBaaoa Veatiag a Braf t Hood-Equipped 

Watiesir Hea»r vMi a Fao-A^asted' Fumace too «■ Type B- 

DoaWe-WaU Gomiaaott Vaat —« lkai»pfe 5(a>. 

TABLE G.2.3 

Masonry Chimney Liner Dimensions witli Circular 

Equivalents 







Inside 






Inside 


Diameter 




Nominal Dimensions 


or Equivalent 


Equivalent 


Liner Size of Liner 


Diameter 


Area 


(in.) 


(in.) 


(in.) 


(in.^) 


4x8 


2-1/2x6-1/2 


4.0 


12.2 






5.0 


19.6 






6.0 


28.3 






7.0 


38.3 


8x8 


6-3/4x6-3/4 


7.4 


42.7 






8.0 


50.3 


8x12 


6-1/2x10-1/2 


9.0 


63.6 






10.0 


78.5 


12x12 


9-3/4x9-3/4 


10.4 


83.3 






11.0 


95.0 


12x16 


9-1/2x13-1/2 


11.8 


107.5 






12.0 


113.0 






14.0 


153.9 


16x16 


13-1/4x13-1/4 


14.5 


162.9 






15.0 


176.7 


16x20 


13x17 


16.2 


206.1 






18.0 


254.4 


20x20 


16-1/2x16-3/4 


18.2 


260.2 






20.0 


314.1 


20x24 


16-1/2x20-1/2 


20.1 


314.2 






22.0 


308.1 


24x24 


20-1/4x20-1/4 


22.1 


308.1 






24.0 


452.3 


24x28 


20-1/4x24-1/4 


24.1 


456.2 


28x28 


24-1/4x24-1/4 


26.4 


543.3 






27.0 


572.5 


30x30 


25-1/2x25-1/2 


27.9 


607.0 


30x36 


25-1/2x31-1/2 


30.9 


749.9 






33.0 


855.3 


36x36 


31-1/2x31-1/2 


34.4 


929.4 






36.0 


1017.9 



For SI units, 1 in. = 25.4 mm, 1 in.^ = 645 mm'. 

Note: When liner sizes differ dimensionally from those shown in this 
table, equivalent diameters can be determined from published tables for 
square and rectangular ducts of equivalent carrying capacity or by 
other engineering methods. 



87 



UNIFORM PLUMBING CODE 



the water heater input rating. The table shows that a 
3 in. vent connector has a maximum input rating of 
37,000 Btu/h. Although this rating is greater than 
the water heater input rating, a 3 in. vent connector 
is prohibited by Section 511.2.18. A 4 in. vent 
connector has a maximum input rating of 67,0000 
Btu/h and is equal to the draft hood outlet diameter. 
A 4 in. vent connector is selected. Since the water 
heater is equipped with a draft hood, there are no 
minimum input rating restrictions. 

Furnace Vent Connector Diameter. Using the Vent 
Connector Capacity portion of Table 5-15, read down 
the Total Vent Height (H) column to 30 ft and across 
the 3 ft Connector Rise (R) row. Since the furnace 
has a fan-assisted combustion system, find the first 
FAN Max column with a Btu/h rating greater than 
the furnace input rating. The 4 in. vent connector 
has a maximum input rating of 119,000 Btu/h and a 
minimum input rating of 85,000 Btu/h. 

The 100,000-Btu/h furnace in this example falls 
within this range, so a 4 in. connector is adequate. 
Since the furnace vent connector horizontal length of 6 
ft is less than the maxim.um value listed in Table 5-8, 
the venting table values can be used without 
adjustment. If the furnace had an input rating of 80,000 
Btu/h, then a Type B vent connector (see Table 5-14) 

Common Vent Diameter. The total input to the 
common vent is 135,000 Btu/h. Using the Common 
Vent Capacity portion of Table 5-15, read down the 
Vent Height (H) column to 30 ft and across this row 
to find the smallest vent diameter in the FAN + NAT 
column that has a Btu/h rating equal to or greater 
than 135,000 Btu/h. The 4 in. common vent has a 
capacity of 132,000 Btu/h and the 5 in. common vent 
has a capacity of 202,000 Btu/h. Therefore, the 5 in. 
common vent should be used in this example. 
Summary. In this example, the installer can use a 4 
in. diameter, single-wall metal vent cormector for the 
water heater and a 4 in. diameter, single-wall metal 
vent connector for the furnace. The common vent 
should be a 5 in. diameter Type B vent. 

G.2.3 Example 5 (b): Common Venting into an 
Interior Masonry Chimney. In this case, the water 
heater and fan-assisted furnace of Example 5 (a) are 
to be common-vented into a clay-tile-lined masonry 
chimney with a 30 ft height. The chimney is not 
exposed to the outdoors below the roof line. The 
internal dimensions of the clay tile liner are 
nominally 8 in. x 12 in. Assuming the same vent 
connector heights, laterals, and materials found in 
example 5 (a), what are the recommended vent 
connector diameters, and is this an acceptable 
installation? 
Solution 
Table 5-17 is used to size common venting 



installations involving single-wall connectors into 
masonry chimneys. 

Water Heater Vent Connector Diameter. Using 
Table 5-17, Vent Connector Capacity, read down the 
Vent Height (H) column to 30 ft, and read across the 
2 ft Connector Rise (R) row to the first Btu/h rating 
in the NAT Max column that is equal to or greater 
than the water heater input rating. The table shows 
that a 3 in. vent connector has a maximum input of 
only 31,000 Btu/h, while a 4 in. vent cormector has a 
maximum input of 57,000 Btu/h. A 4 in. vent 
connector must therefore be used. 

Furnace Vent Connector Diameter. Using the Vent 
Connector Capacity portion of Table 5-17, read down 
the total Vent Height (H) column to 30 ft and across 
the 3 ft Connector Rise (R) row. Because the furnace 
has a fan-assisted combustion system, find the first 
FAN Max column with a Btu/h rating greater than 
the furnace input rating. The 4 in. vent connector 
has a maximum input rating of 127,000 Btu/h and a 
minimum input rating of 95,000 Btu/h. The 100,000 
Btu/h furnace in this example falls within this range, 
so a 4 in. connector is adequate. 

Masonry Chimney. From Table G.2.3, the 
equivalent area for a nominal liner size of 8 in. x 12 
in. is 63.6 in^ Using Table 5-17, Common Vent 
Capacity, read down the FAN + NAT column under 
the Minimum Internal Area of Chinuiey value of 63 
to the row for 30 ft height to find a capacity value of 
739,000 Btu/h. The combined input rating of the 
furnace and water heater, 135,000 Btu/h, is less than 
the table value so this is an acceptable installation. 
Section 511.2.4 requires the common vent area to be 
no greater than seven times the smallest listed 
appliance categorized vent area, flue collar area, or 
draft hood outlet area. Both appliances in this 
installation have 4 in. diameter outlets. From Table 
G.2.3, the equivalent area for an inside diameter of 4 
in. is 12.2 in.^. Seven times 12.2 equals 85.4, which is 
greater than 63.6, so this configuration is acceptable. 

G.2.4 Example 5 (c): Common Venting into an 
Exterior Masonry Chimney. In this case, the water 
heater and fan-assisted furnace of Examples 5 (a) and 
5 (b) are to be common-vented into an exterior 
masonry chimney. The chimney height, clay-tile- 
liner dimensions, and vent connector heights and 
laterals are the same as in Example 5 (b). This 
system is being installed in Charlotte, North 
Carolina. Does this exterior masonry chimney need 
to be relined? If so, what corrugated metallic liner 
size is recommended? What vent connector 
diameters are recommended? See Table G.2.3 and 
Figure 5-14. 
Solution 

According to 13.2.18 Type B vent connectors are 



88 



WATER HEATERS 



required to be used with exterior masonry chimneys. 
Use Table 5-21(a) and Table 5-21(b) to size 
FAN+NAT common venting installations involving 
Type-B double-wall connectors into exterior 
masonry chimneys. 

The local 99 percent winter design temperature 
needed to use Table 5-21 (a) and Table 5-21 (b) can be 
found in the ASHRAE Handbook - Fundamentals. 
For Charlotte, North Carolina, this design 
temperature is 19^. 

Chimney Liner Requirement. As in Example 5 (b), 
use the 63 in.' column of Table 5-21 (a) to the 30 ft 
height row to find that the combined appliance 
maximum input is 747,000 Btu/h. The combined 
input rating, of the appliance in this installation, 
135,000 Btu/h, is less than the maximum value, so 
this criterion is satisfied. Table 5-21(b), at a 19°F 
design temperature, and at the same vent height and 
internal area used earlier, shows that the minimum 
allowable input rating of a space-heating appliance is 
470,000 Btu/h. The furnace input rating of 100,000 
Btu/h is less than this minimum value. So this 
criterion is not satisfied, and an alternative venting 
design needs to be used, such as a Type B vent 
shown in Example 5 (a) or a listed chimney liner 
system shown in the rest of the example. 

According to Section 511.1.6, Table 5-9 or Table 
5-10 are used for sizing corrugated metallic liners in 
masonry chimneys, with the maximum common 
vent capacities reduced by 20 percent. This example 
will be continued assuming Type B vent connectors. 

Water Heater Vent Connector Diameter. UseTable 
5-14 or Table 5-15 for sizing corrugated metallic 
liners in masonry chim^neys, with the maximum 
common vent capacities reduced by 20 percent. This 
example will be continued assuming Type B vent 
connectors. 

Water Heater Vent Connector Diameter. Using 
Table 5-14 Connector Capacity, read down the total 
Vent Height (H) column to 30 ft, and read across the 

2 ft Connector Rise (R) row to the first Btu/hour 
rating in the NAT Max column that is equal to or 
greater than the water heater input rating. The table 
shows that a 3 in. vent connector has a maximum 
capacity of 39,000 Btu/h. Although this rating is 
greater than the water heater input rating, a 3 in. 
vent connector is prohibited by 511.1.6. A 4 in. vent 
connector has a maximum input rating of 70,000 
Btu/h and is equal to the draft hood outlet diameter. 
A 4 in. vent connector is selected. 

Furnace Vent Connector Diameter. Using Table 5- 
14, Vent Connector Capacity, read down the total 
Vent Height (H) column to 30 ft, and read across the 

3 ft Connector Rise (R) row to the first Btu/h rating 
in the FAN MAX column that is equal to or greater 
than the furnace input rating. The 100,000 Btu/h 



furnace in this example falls within this range, so a 4 
in. connector is adequate. 

Chimney Liner Diameter. The total input to the 
common vent is 135,000 Btu/h. Using the Common 
Vent Capacity portion of Table 5-14, read down the 
total Vent Height (H) column to 30 ft and across this 
row to find the smallest vent diameter in the FAN + 
NAT column that has a Btu/h rating greater than 
135,000 Btu/h. The 4 in. common vent has a capacity 
of 138,000 Btu/h. Reducing the maximum capacity 
by 20 percent (see 13.2.19) results in a maximum 
capacity for a 4 in. corrugated liner of 110,000 Btu/h, 
less than the total input of 135,000 Btu/h. So a larger 
liner is needed. The 5 in. common vent capacity 
listed in Table 5-14 is 210,000 Btu/h, and after 
reducing by 20 percent is 168,000 Btu/h. Therefore, 
a 5 in. corrugated metal liner should be used in this 
example 

Single Wall Connectors. Once it has been 
established that relining the chimney is necessary. 
Type B double-wall vent connectors are not 
specifically required. This example could be redone 
using Table 5-15 for single- wall vent connectors. For 
this case, the vent connector and liner diameters 
would be the same as found for Type B double-wall 
connectors. 

The following is originally from NFPA 54 which 
contains additional reference. 

Example of Combination of Indoor and Outdoor 
Combustion and Ventilation Opening Design 

J.l Example of Combination Indoor and Outdoor 
Combustion Air Opening. Determine the required 
combination of indoor and outdoor combustion air 
opening sizes for the following equipment 
installation example. 

Example Installation: A fan-assisted furnace and a 
draft-hood-equipped water heater with the following 
inputs are located in a 15 ft x 30 ft basement with an 
8 ft ceiling. No additional indoor spaces can be used 
to help meet the equipment combustion air needs. 

Fan-Assisted Furnace Input: 100,000 Btu/h 

Draft-Hood-Equipped Water Heater Input: 

40,000 Btu/h 

Solution 

(1) Determine the total available room volume: 
Equipment room volume: 15 ft x 30 ft with, an 8 ft 
ceiling = 3600 ft^ 

(2) Determine the total required volume: The standard 
method to determine combustion air will be 
used to calculate the required volume. 



89 



G.2.4 



UNIFORM PLUMBING CODE 



The combined input for the appliances located in 
the basement is calculated as follows: 

100,000 Btu/h +40,000 Btu/h = 140,000 Btu/h 
The Standard Method requires that the required 
volume be determined based on 50 cubic feet per 
1000 Btu/hour. Using Table A. 8. 3.2.1, the 
required volume for a 140,000 Btu/h water 
heater is 7,000 ft^. 

Conclusion: Indoor volume is insufficient to 
supply combustion air since the total of 3600 ft' 
does not meet the required volume of 7000 ft^ 
Therefore, additional combustion air must be 
provided from the outdoors. 

(3) Determine ratio of the available volume to the 

required volume: 
3600 ft^ = 0.51 
7000 ff 

(4) Determine the reduction factor to be used to 
reduce the full outdoor air opening size to the 
minimum required based on ratio of indoor 
spaces 

1.00 - 0.51 (from Step 3) = 0.49 

(5) Determine the single outdoor combustion air 
opening size as if all combustion air is to come 
from outdoors. In this example, the combustion 
air opening directly communicates with the outdoors. 

140,000 Btu/h= 47 in.^ 
3,000 Btu/in^ 

(6) Determine the minimum outdoor combustion 
air opening area: 

Outdoor opening area = 0.49 
(from Step 4) x 47 in^- 23 in.' 
Section 507.3 requires the minimum dimension of the 
air opening should not be less than 3 in. 



TABLE A.8.3.2.1 
Standard Method Volume, All Appliances 



Appliance Input 


Required Volume 


(Btu/h) 


(ft.^) 


5,000 


250 


10,000 


500 


15,000 


750 


20,000 


1,000 


25,000 


1,250 


30,000 


1,500 


35,000 


1,750 


40,000 


2,000 


45,000 


2,250 


50,000 


2,500 


55,000 


2,750 


60,000 


3,000 


65,000 


3,250 


70,000 


3,500 


75,000 


3,750 


80,000 


4,000 


85,000 


4,250 


90,000 


4,500 


95,000 


4,750 


100,000 


5,000 


105,000 


5,250 


110,000 


5,500 


115,000 


5,750 


120,000 


6,000 


125,000 


6,250 


130,000 


6,500 


135,000 


6,750 


140,000 


7,000 


145,000 


7,250 


150,000 


7,500 


160,000 


8,000 


170,000 


8,500 


180,000 


9,000 


190,000 


9,500 


200,000 


10,000 


210,000 


10,500 


220,000 


11,000 


230,000 


11,500 


240,000 


12,000 


250,000 


12,500 


260,000 


13,000 


270,000 


13,500 


280,000 


14,000 


290,000 


14,500 


300,000 


15,000 



507.4.1 See Figure 5-8 • 507.4.1(1) See Figure 5-9 and 
Figure 5-10 • 507.4.1(2) See Figure 5-11 • 507.4.2 See 
Figure 5-12 • For information on gas convenience 
outlets, see AG A 7-90, Requirements for Gas Convenience 
Outlets. 



90 



CHAPTER 6 

WATER SUPPLY AND DISTRIBUTION 



601.0 Running Water Required. 

601 .1 Except where not deemed necessary for safety 
or sanitation by the Authority Having Jurisdiction, 
each plumbing fixture shall be provided with an 
adequate supply of potable running water piped 
thereto in an approved manner, so arranged as to 
flush and keep it in a clean and sanitary condition 
without danger of backflow or cross-connection. 
Water closets and urinals shall be flushed by means 
of an approved flush tank or flushometer valve. In 
jurisdictions which adopt Appendix J, water closets, 
urinals, and trap primers in designated non- 
residential buildings may be provided with 
reclaimed water as defined and regulated by 
Appendix J of this code. 

601.2 Identification of a Potable and Nonpotable 
Water System. In all buildings where potable water 
and nonpotable water systems are installed, each 
system shall be clearly identified. Each system shall 
be color coded as follows: 

601.2.1 Potable Water - Green background 
with white lettering. 

601 .2.2 Nonpotable Water - Yellow background 
with black lettering, with the words "Caution: 
Nonpotable water, do not drink." 

Each system shall be identified with a 
colored band to designate the liquid being 
conveyed, and the direction of normal flow shall 
be clearly shown. The minimum size of the 
letters and length of the color field shall conform 
to Table 6-1. 

A colored identification band shall be 
indicated every twenty (20) feet (6096 mm) but 
at least once per room, and shall be visible from 
the floor level. 

Where vacuum breakers or backflow 
preventers are installed with fixtures listed in 
Table 14-1, identification of the discharge side 
may be omitted. Each outlet on the nonpotable 
water line which could be used for special 
purposes shall be posted as follows: 

"Caution: Nonpotable water, do not drink." 

601.2.3 Reclaimed Water - Purple (Pantone 
color #512) background and shall be imprinted 
in nominal 1/2 in. (12.7 mm) high, black upper 
case letters, with the words "Caution: Reclaimed 
water, do not drink." 

601 .3 Faucets and diverters shall be connected to 
the water distribution system so that hot water 
corresponds to the left side of the fittings. 



TABLE 6-1 
Minimum Length of Color Field and Size of Letters 



Outside Diameter 


l\/linimum Length 


IVIinimum Size 


of Pipe or 


Covering 


of Color Field 


of Lette 


rs 


inchies 


(mm) 


inches 


(mm) 


inches 


(mm) 


1/2 to 1-1/4 


(15 to 32) 


8 


(203) 


1/2 


(12.7) 


1-1/2 to 2 


(40.to 50) 


8 


(203) 


3/4 


(19.1) 


2-1/2 to 6 


(65 to 150) 


12 


(305) 


1-1/4 


(32) 


8 to 10 


(200 to 250) 


1 24 


(619) 


2-1/2 


(64) 


Over 10 


(Over 250) 


32 


(813) 


3-1/2 


(89) 



602.0 Unlawful Connections 

602.1 No installation of potable water supply piping 
or part thereof shall be made in such a manner that it 
will be possible for used, unclean, polluted, or 
contaminated water, mixtures, or substances to enter 
any portion of such piping from any tank, receptor, 
equipment, or plumbing fixture by reason of back- 
siphonage, suction, or any other cause, either during 
normal use and operation thereof or when any such 
tank, receptor, equipment, or plumbing fixture is 
flooded or subject to pressure in excess of the 
operating pressure in the hot or cold water piping. 

602.2 No person shall make a connection or allow 
one to exist between pipes or conduits carrying 
domestic water supplied by any public or private 
water service system, and any pipes, conduits, or 
fixtures containing or carrying water from any other 
source or containing or carrying water which has 
been used for any purpose whatsoever, or any piping 
carrying chemicals, liquids, gases, or any substances 
whatsoever, unless there is provided a backflow 
prevention device approved for the potential hazard 
and maintained in accordance with this code. 

602.3 No plumbing fixture, device, or construction 
shall be installed or maintained or shall be connected 
to any domestic water supply when such installation 
or connection may provide a possibility of polluting 
such water supply or may provide a cross- 
connection between a distributing system of water 
for drinking and domestic purposes and water 
which may become contaminated by such plumbing 
fixture, device, or construction unless there is 
provided a backflow prevention device approved for 
the potential hazard. 

602.4 No water piping supplied by any private 
water supply system shall be connected to any other 



91 



602.4 - Table 6-2 



UNIFORM PLUMBING CODE 



source of supply without the approval of the 
I Authority Having Jurisdiction, Health Department, 
or other Department Having Jurisdiction. 

603.0 Cross-Connection Control. 

Cross-connection control shall be provided in ac- 
cordance with the provisions of this chapter. 

No person shall install any water operated 
equipment or mechanism, or use any water-treating 
chemical or substance, if it is found that such 
equipment, mechanism, chemical, or substance may 
cause pollution or contamination of the domestic 
water supply. Such equipment or mechanism may be 
permitted only when equipped with an approved 
backflow prevention device or assembly. 



603.1 Approval of Devices or Assemblies. Before 
any device or assembly is installed for the prevention 
of backflow, it shall have first been approved by the 
Authority Having Jurisdiction. Devices or assemblies 
shall be tested for conformity with recognized stan- 
dards or other standards acceptable to the Authority 
Having Jurisdiction which are consistent with the 
intent of this code. 

All devices or assemblies installed in a potable 
water supply system for protection against backflow 
shall be maintained in good working condition by 
the person or persons having control of such devices 
or assemblies. The Authority Having Jurisdiction or 
other department having jurisdiction may inspect 
such devices or assemblies and, if found to be 



TABLE 6-2 
Backflow Prevention Devices, Assemblies, and Methods 





Degree of Hazard 




Device, 
Assembly, or 
Method' 


Pollution 
(Low Hazard) 


Contamination 
(High Hazard) 


Installation'' 




Back- 
Siphonage 


Back- 
Pressure 


Back- 
Siphonage 


Back- 
Pressure 




Airgap 


X 




X 




See Table 6-3 in this chapter 


Atmospheric 

Vacuum 

Breaker 


X 




X 




Upright position. No valve 
downstream. Minimum of 
six (6) inches (152 mm) or 
listed distance above all 
downstream piping and 
flood-level rim of receptor. *'5 


Spill-Proof 
Pressure-Type 
Vacuun\ 
Breaker 


X 




X 




Upright position. Minimum 
of six (6) inches (152 mm) or 
listed distance above all 
downstream piping and 
flood-level rim of receptor .s 


Double Check 
Valve Backflow 
Preventer 


X 


X 






Horizontal, unless otherwise 
listed. Requires one (1 . 
foot (305 mm) minimum 
clearance at bottom for main- 
tenance. May need platform/ 
ladder for test and repair. 
Does not discharge water. 


Pressure 
Vacuum 
Breaker 


X 




X 




Upright position. May have 
valve downstream. Minimum 
of twelve (12) inches (305 mm) 
above all downstream, pi- 
ping and flood-level rim of 
receptor. May discharge water. 


Reduced 
Pressure 
Principle 
Backflow 
Preventer 


X 


X 


X 


X 


Horizontal unless otherwise 
listed. Requires one (1) foot 
(305 mm) minimum clear- 
ance at bottom for main- 
tenance. May need platform 
ladder for test and repair 
May discharge water. 



' See description of devices and assemblies in this chapter. 

^ Installation in pit or vault requires previous approval by the Authority Having Jurisdiction. 

' Refer to general and specific requirement for installation. 

" Not to be subjected to operating pressure for more than 12 hours in any 24 hour period. 

^ For deck-mounted and equipment-mounted vacuum breaker, see Section 603.4.16. 



92 



WATER SUPPLY AND DISTRIBUTION 



603.1 -Table 6-3 



defective or inoperative, shall require the repair or 
replacement thereof. No device or assembly shall be 
removed from use or relocated or other device or 
assembly substituted, without the approval of the 
Authority Having Jurisdiction. 

603.2 Backflow Prevention Devices, Assemblies, 
and Methods. 

603.2.1 Airgap. The minimum airgap to afford 
backflow protection shall be in accordance with 
Table 6-3. 

603.2.2 Atmospheric Vacuum Brealter (AVB). 

An atmospheric vacuum breaker consists of a 
body, a checking member, and an atmospheric 
opening. 

603.2.3 Hose Connection Baclcflow Preventer. 

A hose connection backflow preventer consists of 
two independent check valves with an independent 
atmospheric vent between and a means of field 
testing and draining. 



603.2.4 Double Check Valve Backflow 
Prevention Assembly (DC). A double check 
valve backflow prevention assembly consists of 
two independently acting internally loaded check 
valves, four properly located test cocks, and 
two isolation valves. 

603.2.5 Pressure Vacuum Breaker Backflow 
Prevention Assembly (PVB). A pressure 
vacuum breaker backflow prevention assembly 
consists of a loaded air inlet valve, an internally 
loaded check valve, two (2) properly located test 
cocks, and two (2) isolation valves. This device 
shall be installed outdoors only if provisions for 
spillage are provided. 

603.2.6 Pressure Vacuum Breaker Spill-Proof 
Type Backflow Prevention Assembly (SVB). 

A pressure type vacuum breaker backflow 
prevention assembly consisting of one (1) check 
valve force-loaded closed and an air inlet vent 
valve force-loaded open to atmosphere. 



TABLE 6-3 
Minimum Airgaps for Water Distribution'' 



Fixtures 


When not affected 
by side walls^ 
Inches (mm) 


When affected by 

side walP 

Inches (mm) 


Effective openings^ not greater 
than one-half (1/2) inch (12.7 mm) 
in diameter 


1 (25.4) 


1-1/2 (38) 


Effective openings^ not greater 
than three-quarters (3/4) inch 
(20 mm) in diameter 


1-1/2 (38) 


2-1/4 (57) 


Effective openings^ not greater 
than one (1) inch (25 mm) in 
diameter 


2 (51) 


3 (76) 


Effective openings^ greater than 
one (1) inch (25 mm) in diameter 


Two (2) times 

diameter of 

effective opening 


Three (3) times 

diameter of 
effective opening 



' Side walls, ribs, or similar obstructions do not affect airgaps when spaced from the inside edge of the spout opening a distance 
greater than three times the diameter of the effective opening for a single wall, or a distance greater than four times the effective 
opening for two intersecting walls. 

^ Vertical walls, ribs, or similar obsttructions extending from the water surface to or above the horizontal plane of the spout opening 
other than specified in Note 1 above. The effect of three or more such vertical walls or ribs has not been determined. In such cases, 
the airgap shall be measured from the top of the wall. 

' The effective opening shall be the minimum cross-sectional area at the seat of the control valve or the supply pipe or tubing which 
feeds the device or outlet. If two or more lines supply one outlet, the effective opening shall be the sum of the cross-sectional areas 
of the individual supply lines or the area of the single outlet, whichever is smaller. 

" Airgaps less than one (1) inch (25.4 mm) shall be approved only as a permanent part of a listed assembly that has been tested 
under actual backflow conditions with vacuums of to 25 inches (635 mm) of mercury. 



93 



603.2 - 603.4 



UNIFORM PLUMBING CODE 



positioned downstream of the check valve, and 
located between and including two (2) tightly 
closing shutoff valves and test cocks. 

603.2.7 Reduced Pressure Principle 
Bacicflow Prevention Assembly (RP). A 

reduced pressure principle backflow prevention 
assembly consists of two independently acting 
internally loaded check valves, a differential 
pressure relief valve, four properly located test 
cocks, and two isolation valves. 

603.3 General Requirements. 

603.3.1 All assemblies shall conform to listed 
standards and be acceptable to the Authority 
Having Jurisdiction with jurisdiction over the 
selection and installation of backflow prevention 
assemblies. 

603.3.2 Where more than one (1) backflow 
prevention valve is installed on a single premise, 
and the valves are installed in one location, each 
separate valve shall be permanently identified 
by the permittee in a manner satisfactory to the 
Authority Having Jurisdiction. 

603.3.3 The premise owner or responsible 
person shall have the backflow prevention 
assembly tested by a certified backflow assembly 
tester at the time of installation, repair, or 
relocation and at least on an annual schedule 
thereafter or more often when required by the 
Authority Having Jurisdiction. The periodic 
testing shall be performed in accordance with 
the procedures referenced in Table 14-1 by a 
tester qualified in accordance with those standards. 

603.3.4 Access and clearance shall be provided 
for the required testing, maintenance, and 
repair. Access and clearance shall require a 
minimum of one (1) foot (305 mm) between the 
lowest portion of the assembly and grade, floor, 
or platform. Installations elevated more than five 
(5) feet (1524 mm) above the floor or grade shall 
be provided with a permanent platform capable 
of supporting a tester or maintenance person. 

603.3.5 Direct connections between potable 
water piping and sewer connected wastes shall 
not exist under any condition with or without 
backflow protection. Where potable water is 
discharged to the drainage system it shall be by 
means of an approved airgap of two (2) pipe 
diameters of the supply inlet, but in no case shall 
the gap be less than one (1) inch (25 mm). 
Connection may be made to the inlet side of a 
trap provided that an approved vacuum breaker 
is installed not less than six (6) inches (152 mm) 
or the distance according to the device's listing, 
above the flood-level rim of such trapped 
fixture, so that at no time will any such device 
be subjected to any back-pressure. 



603.3.6 Backflow preventers for hot water over 
110°F (43.3°C) shall be a type designed to op- 
erate at temperatures of 110°F (43.3°C) or more 
without rendering any portion of the assembly 
inoperative. 

603.3.7 Fixtures, appliances, or appurtenances 
with integral backflow preventers or integral 
airgaps manufactured as a unit shall be installed 
in accordance with their listing requirements 
and the manufacturers' instructions. 

603.3.8 In cold climate areas, backflow 
assemblies and devices shall be protected from 
freezing by a method acceptable to the Authority 
Having Jurisdiction. 

603.4 Specific Requirements. 

603.4.1 Water closet and urinal flushometer 
valves shall be equipped with an atmospheric 
vacuum breaker. The vacuum breaker shall be 
installed on the discharge side of the flushometer 
valve with the critical level at least six (6) inches 
(152 mm) or the distance according to its listing 
above the overflow rim of a water closet bowl or 
the highest part of a urinal. 

603.4.2 Water closet and urinal tanks shall be 
equipped with a ballcock. The ballcock shall be 
installed with the critical level at least one (1) 
inch (25.4 mm) above the full opening of the 
overflow pipe. In cases where the ballcock has no 
hush tube, the bottom of the water supply inlet 
shall be installed one (1) inch (25.4 mm) above 
the full opening of the overflow pipe. 

603.4.3 Water closet flushometer tanks shall be 
protected against backflow by an approved 
backflow prevention assembly, device, or method. 

603.4.4 Heat Exchangers. 

603.4.4.1 Heat exchangers used for heat 
transfer, heat recovery, or solar heating shall 
protect the potable water system from being 
contaminated by the heat transfer medium. 
Double-wall heat exchangers shall separate 
the potable water from the heat transfer 
medium by providing a space between the 
two walls which is vented to the atmosphere. 

603.4.5 Water supply inlets to tanks, vats, 
sumps, swimming pools, and other receptors 
shall be protected by one of the following 
means: 

(1) An approved airgap; 

(2) A listed vacuum breaker installed on the 
discharge side of the last valve with the 
critical level not less than six (6) inches (152 
mm) or in accordance with its listing; 

(3) A backflow preventer suitable for the 
contamination or pollution, installed in 



94 



WATER SUPPLY AND DISTRIBUTION 

accordance with the requirements for that 
type of device or assembly as set forth in 
this chapter. 

603.4.6 Protection from Lawn Sprinklers and 
Irrigation Systems. 

603.4.6.1 Potable water supplies to systems 
having no pumps or connections for pumping 
equipment, and no chemical injection or 
provisions for chemical injection, shall be 
protected from backflow by one of the 
following devices: 

(1) Atmospheric vacuum breaker 

(2) Pressure vacuum breaker 

(3) Reduced pressure backflow preventer 

603.4.6.2 Where sprinkler and irrigation 
systems have pumps, connections for pumping 
equipment, or auxiliary air tanks or are 
otherwise capable of creating back-pressure, the 
potable water supply shall be protected by 
the following type of device if the backflow 
device is located upstream from the source 
of back-pressure: 

(1) Reduced pressure backflow preventer 

603.4.6.3 Where systems have a backflow 
device installed downstream from a potable 
water supply pump or a potable water supply 
pump connection, the device shall be one of 
the following: 

(1) Atmospheric vacuum breaker 

(2) Pressure vacuum breaker 

(3) Reduced pressure backflow preventer 

603.4.6.4 Where systems include a chemical 
injector or any provisions for chemical injection, 
the potable water supply shall be protected 
by the following: 

(1) Reduced pressure backflow preventer 

603.4.7 Potable water outlets with hose 
attachments, other than water heater drains, 
boiler drains, and clothes washer connections, 
shall be protected by a non-removable hose bibb 
type backflow preventer, a non-removable hose 
bibb type vacuum breaker, or by an atmospheric 
vacuum breaker installed at least six (6) inches 
(152 mm) above the highest point of usage 
located on the discharge side of the last valve. In 
climates where freezing temperatures occur, a 
listed self-draining frost-proof hose bibb with an 
integral backflow preventer or vacuum breaker 
shall be used. 

603.4.8 DELETED. 

603.4.9 Water cooled compressors, de-greasers 
or any other water cooled equipment shall be 



603.4 

protected by a backflow preventer installed in - 
accordance with the requirements of this chapter. 
Note: 

Water cooled equipment which produces back- 
pressure shall be equipped with the appropriate 
protection. 

603.4.10 Water inlets to water supplied 
aspirators shall be equipped with a vacuum - 
breaker installed in accordance with its listing 
requirements and this chapter. The discharge 
shall drain through an air gap. When the 
tailpiece of a fixture to receive the discharge of 
an aspirator is used, the air gap shall be located 
above the flood-level rim of the fixture. 

603.4.1 1 Potable water make up connections to 
steam or hot water boilers shall be provided 
with a listed backflow protection assembly. 

603.4.12 Nonpotable Water Piping. In cases 
where it is impractical to correct individual 
cross-connections on the domestic water line, the 
line supplying such outlets shall be considered a 
non-potable water line. No drinking or domestic 
water outlets shall be connected to the non- 
potable water line. Whenever possible, all 
portions of the non-potable water line shall be 
exposed, and all exposed portions shall be 
properly identified in a manner satisfactory to 
the Authority Having Jurisdiction. Each outlet | 
on the non-potable water line which may be 
used for drinking or domestic purposes shall be 
posted: "Caution: Non-potable water, do not drink." 

603.4.13 Potable water supply to carbonators 
shall be protected by either an airgap or a vented 
backflow preventer for carbonated beverage 
dispensers installed within the carbonated 
beverage dispenser. The carbonated beverage 
dispenser shall bear the label of an approved 
testing agency, certifying and attesting that such 
equipment has been tested and inspected and 
meets the requirements of the approved 
applicable standard. Carbonated beverage 
dispensers without an approved internal airgap 
or vented backflow preventer for carbonated 
beverage dispensers and carbonated beverage 
dispensing systems shall have the water supply 
protected with a vented backflow preventer for 
carbonated beverage dispensers. 

603.4.14 Water Treatment Units. Reverse 
osmosis drinking water treatment units shall 
meet the requirements of the appropriate 
standards referenced in Table 14-1. Waste or 
discharge from reverse osmosis or other t)^pes of 
water treatment units shall enter the drainage: 
system through an airgap. 



95 



603.4-604.1 



UNIFORM PLUMBING CODE 



603.4.15 Backflow preventers shall not be 
located in any area containing fumes that are 
toxic, poisonous, or corrosive. 

603.4.16 Deck-mounted or equipment- 
mounted vacuum breakers shall be installed in 
accordance with their Usting and the manufacturers' 
instructions, with the critical level not less than 
one (1) inch (25.4 mm) above the flood-level rim. 

603.4.17 DELETED. 

603.4.18 Protection from Fire Systems. 

603.4.18.1 Except as provided under 
Sections 603.4.18.2 and 603.4.18.3, potable 
water supplies to fire protection systems 
that are normally under pressure, including 
but not limited to standpipes and automatic 
sprinkler systems, except in one- or two- 
family residential sprinkler systems, piped in 
materials approved for potable water 
distribution systems shall be protected from 
back-pressure and back-siphonage by one of 
the following testable devices: 

(1) Double check valve assembly 

(2) Double check detector assembly 

(3) Reduced pressure backflow preventer 

(4) Reduced pressure detector assembly 

Potable water supplies to fire protection 
systems that are not normally under 
pressure shall be protected from backflow 
and shall meet the requirements of the 
appropriate standards referenced in Table 14-1. 

603.4.18.2 Where fire protection systems 
supplied from a potable water system 
include a fire department (siamese) 
connection which is located less than 
seventeen hundred (1700) feet (518.2 m) 
from a non-potable water source that could 
be used by the fire department as a 
secondary water supply, the potable water 
supply shall be protected by one of the 
following: 

(1) Reduced pressure backflow preventor 

(2) Reduced pressure detector assembly 

Note: 

Non-potable water sources include fire 
department vehicles carrying water of 
questionable quality or water that is treated 
with antifreeze, corrosion inhibitors, or 
extinguishing agents. 

603.4.18.3 Where antifreeze, corrosion 
inhibitors, or other chemicals are added to a 
fire protection system supplied from a 
potable water supply, the potable water 
system shall be protected by one of the 
following: 



(1) Reduced pressure backflow preventer 

(2) Reduced pressure detector assembly. 

603.4.18.4 Whenever a backflow device is 
installed in the potable water supply to a 
fire protection system, the hydraulic design 
of the system shall account for the pressure 
drop through the backflow device. If such 
devices are retrofitted for an existing fire 
protection system, the hydraulics of the 
sprinkler system design shall be checked to 
verify that there will be sufficient water 
pressure available for satisfactory operation 
of the fire sprinklers. 

603.4.18.5 Residential Sprinkler Systems. 

When residential sprinkler systems are 
installed using the potable water system, 
they shall be installed in accordance with 
the standards listed in Table 14-1. 

603.4.19 Special Equipment, Water Supply 
Protection. Vacuum breakers for washer-hose 
bedpans shall be located not less than five (5) 
feet (1524 mm) above the floor. Hose 
connections in health care or laboratory areas 
shall not be less than six (6) feet (1829 mm) 
above the floor. 

603.4.20 Portable cleaning equipment, dental 
vacuum pumps, and chemical dispensers shall 
be protected from backflow by an airgap, an 
atmospheric vacuum breaker, a spill-proof 
vacuum breaker, or a reduced pressure principle 
backflow preventer. 

603.4.21 Water Heater Connectors. Flexible 
metallic water heater connectors or reinforced 
flexible water heater connectors connecting 
water heaters to the piping system shall be in 
compliance with the appropriate standards 
listed in Table 14-1. 

603.4.22 Combination stop-and-waste valves or 
cocks shall not be installed underground. 

603.4.23 Pure Water Process Systems - (See 
TIA on page vii) 

603.4.23.1 Dialysis Water Systems - (See 
TIA on page vii) 

604.0 Materials. 

604.1 Water distribution pipe, building supply 
water pipe, and fittings shall be of brass, copper, cast 
iron, CPVC, galvanized malleable iron, galvanized 
wrought iron, galvanized steel, PEX, or other 
approved materials. Asbestos-cement, PE, PVC, 
PEX-AL-PEX, or PE-AL-PE water pipe manufactured 
to recognized standards may be used for cold water 
building supply distribution systems outside a 
building. PEX-AL-PEX water pipe, tubing, and 
fittings manufactured to recognized standards may 



96 



WATER SUPPLY AND DISTRIBUTION 



604.1 -605.2 



be used for hot and cold water distribution systems 

I within a building. PE-AL-PE water pipe and fittings 
may be used for cold water distribution systems 
within a building. All materials used in the water 
supply system, except valves and similar devices, 
shall be of a like material, except where otherwise 
I approved by the Authority Having Jurisdiction. 

604.2 Copper tube for water piping shall have a 
weight of not less than Type L. 

Exception: Type M copper tubing may be used 
for water piping when piping is above ground 
in, or on, a building or underground outside of 
structures. 

604.3 All hard-drawn copper tubing, in addition to 
the required incised marking, shall be marked in 
accordance with sections 19.3.1 and 19.3.2 of ASTM B 
88-99 Seamless Copper Water Tube. The colors shall be: 
Type K, green; Type L, blue; Type M, red; Type 
DWV, yellow. 

604.4 Listed flexible copper water connectors shall be 
installed in readily accessible locations, unless 
otherwise listed. 

604.5 Cast iron fittings up to and including two (2) 
inches (51 mm) in size, when used in connection 
with potable water piping, shall be galvanized. 

604.6 All malleable iron water fittings shall be 
galvanized. 

604.7 Piping and tubing which has previously been 
used for any purpose other than for potable water 
systems shall not be used. 

604.8 Approved plastic materials may be used in 
water service piping, provided that where metal 
water service piping is used for electrical grounding 
purposes, replacement piping therefor shall be of 
like materials. 

Exception: Where a grounding system 
acceptable to the Authority Having Jurisdiction 
is installed, inspected, and approved, metallic 
pipe may be replaced with non-metallic pipe. 

604.9 Solder shall conform to the requirements of 
Section 316.1.3. 

604.10 Water pipe and fittings with a lead content 
which exceeds eight (8) percent shall be prohibited in 
piping systems used to convey potable water. 

604.11 PEX. Cross-linked polyethylene (PEX) tubing 
shall be marked with the appropriate standard 
designation(s) listed in Table 14-1 for which the tubing 
has been approved. PEX tubing shall be installed in 
compliance with the provisions of this section. 

604.11.1 PEX Fittings. Metal insert fittings, 
metal compression fittings, and cold expansion 
fittings used with PEX tubing shall be 
manufactured to and marked in accordance with 
the standards for the fittings in Table 14-1. 



604.11.2 Water Heater Connections. PEX 

tubing shall not be installed within the first 
eighteen (18) inches (457 mm) of piping 
connected to a water heater. 

604.12 Flexible Corrugated Connectors. Flexible 
corrugated connectors of copper or stainless steel 
shall be limited to the following connector lengths: 

Water Heater Connectors - twenty-four (24) 
inches (609 mm). 

Fixture Connectors - thirty (30) inches (762 mm). 

Washing Macliine Connectors - seventy-two 
(72) inches (1827 mm). 

Dishwasher and Icemaker Connectors - one 

hundred twenty (120) inches (3048 mm). 

604.13 PEX-AL-PEX and PE-AL-PE. Crosslinked 
polyethylene-aluminum-crosslinked polyethylene 
(PEX-AL-PEX) and polyethylene-aluminum- 
polyethylene (PE-AL-PE) composite pipe shall be 
marked with the appropriate standard designations 
listed in Table 14-1 for which the piping has been 
listed or approved. PEX-AL-PEX and PE-AL-PE 
piping shall be installed in compliance with the 
provisions of this section. 

604.13.1 PEX-AL-PEX and PE-AL-PE. Fittings 
used with PEX-AL-PEX and PE-AL-PE piping 
shall be manufactured to and marked in 
accordance with the standard for the fittings in 
Table 14-1. 

604.13.2 Water Heater Connections. PEX-AL- 
PEX or PE-AL-PE tubing shall not be installed 
within the first eighteen inches (18) (457 mm) of 
piping connected to a water heater. 

604.14 Dialysis Water System - (See TIA on page vii) 

605.0 Valves. 

605.1 Valves up to and including two (2) inches (51 
mm) in size shall be brass or other approved 
material. Sizes over two (2) inches (51 mm) may have 
cast iron or brass bodies. Each gate or ball valve shall 
be a fullway type with working parts of 
noncorrosive material. 

605.2 A fullway valve controlling all outlets shall be 
installed on the discharge side of each water meter 
and on each unmetered water supply. Water piping 
supplying more than one building on any one premises 
shall be equipped with a separate fullway valve to each 
building, so arranged that the water supply can be 
turned on or off to any individual or separate building 
provided, however, that supply piping to a single- 
family residence and building accessory thereto, may 
be controlled on one valve. Such shutoff valves shall be 
accessible at all times. A fullway valve shall be :installed 
on the discharge piping from water supply tanks at or 
near the tank. A fullway valve shall be installed on the 



97 



605.2 - 608.2 



UNIFORM PLUMBING CODE 



cold water supply pipe to each water heater at or near 
the water heater. 

605.3 In multi-dwelling units, one (1) or more 
shutoff valves shall be provided in each dwelling 
unit so that the water supply to any plumbing fixture 
or group of fixtures in that dwelling unit can be shut 
off without stopping water supply to fixtures in 
other dwelling units. These valves shall be accessible 
in the dwelling unit that they control. 

605.4 All valves used to control two (2) or more 
openings shall be fuUway gate valves, ball valves, or 
other approved valves designed and approved for 
the service intended. 

605.5 A control valve shall be installed 
immediately ahead of each water-supplied 
appliance and immediately ahead of each slip joint 
or appliance supply. 

Parallel water distribution systems shall provide 
a control valve either immediately ahead of each 
fixture being supplied or installed at the manifold 
and shall be identified with the fixture being 
supplied. 

605.6 All required shutoff or control valves shall be 
accessible. 

605.7 A single control valve shall be installed on a 
water supply line ahead of any automatic metering 
valve which supplies a battery of fixtures. 

606.0 Joints and Connections. 

606.1 Types of Joints. 

606.1.1 Flared Joints. Flared joints for soft 
copper water tubing shall be made with fittings 
meeting approved standards. The tubing shall 
be reamed to the full bore, resized to round, and 
expanded with a proper flaring tool. 

606.1.2 l\/lechanical Joints. Mechanical joints 
for cast iron water pipe shall conform to 
nationally recognized standards. 

606.1.3 IVlechanically Formed Tee Fittings. 

Mechanically extracted collars shall be formed in 
a continuous operation consisting of drilling a 
pilot hole and drawing out the tube surface to 
form a collar having a height not less than three 
(3) times the thickness of the branch tube wall. 

The branch tube shall be notched to conform 
with the inner curve of the run tube and shall have 
two (2) dimple /depth stops to ensure that 
penetration of the branch tube into the collar is of 
sufficient depth for brazing and that the branch 
tube does not obstruct the flow in the main line 
tube. Dimple /depth stops shall be in line with the 
run of the tube. The second dimple shall be one 
quarter (1/4) inch (6.35 mm) above the first and 



shall serve as a visual point of inspection. 

All joints shall be brazed in accordance with 
Section 316.1.7. Soft soldered joints shall not be 
allowed. 

606.1.4 -Dialysis Water Systems (SeeHAonpagevii) 

606.2 Use of Joints. 

606.2.1 Copper Water Tube. Joints in copper 
tubing shall be made by the appropriate use of 
approved fittings properly soldered or brazed 
together as provided in Section 316.1.3 or 316.1.7 
or by means of approved flared or compression 
fittings in Section 606.1.1 or 606.1.3. Solder and 
soldering flux shall conform to the requirements 
of Section 316.1.3. Mechanically formed tee 
fittings shall be made by brazing only and shall 
conform to the requirements of Section 316.1.7. 

606.2.2 Plastic Fittings. Female PVC screwed 
fittings for water piping shall be used with 
plastic male fittings and plastic male threads only. 

606.2.3 Slip Joints. In water piping, slip joints 
may be used only on the exposed fixture supply. 

607.0 Gravity Supply Tanks. 

Gravity tanks for potable water shall be tightly 
covered, and have not less than a sixteen (16) square 
inch (10,323 mm^) overflow screened with copper 
screen having not less than fourteen (14) nor more 
than eighteen (18) openings per linear inch (25.4 mm). 

608.0 Water Pressure, Pressure Regulators, 
Pressure Relief Valves, and Vacuum Relief 
Valves. 

608.1 inadequate Water Pressure. Whenever the 
water pressure in the main or other source of supply 
will not provide a residual water pressure of at least 
fifteen (15) pounds per square inch (103.4 kPa), after 
allowing for friction and other pressure losses, a tank 
and a pump or other means which will provide said 
fifteen (15) pound (103.4 kPa) pressure shall be 
installed. Whenever fixtures and /or fixture fittings 
are installed that require residual pressure higher 
than fifteen (15) pounds per square inch (103.4 kPa), 
that minimum residual pressure shall be provided. 

608.2 Excessive Water Pressure. Where local 
static water pressure is in excess of eighty (80) 
pounds per square inch (552 kPa), an approved type 
pressure regulator preceded by an adequate strainer 
shall be installed and the static pressure reduced to 
eighty (80) pounds per square inch (552 kPa) or less. 
For potable water services up to and including one 
and one-half (1-1/2) inch (40 mm) regulators, 
provision shall be made to prevent pressure on the 
building side of the regulator from exceeding main 
supply pressure. Approved regulators with integral 



98 



WATER SUPPLY AND DISTRIBUTION 



608.2 - 609.3 



bypasses shall be acceptable. Each such regulator 
and strainer shall be accessibly located and shall 
have the strainer readily accessible for cleaning 
without removing the regulator or strainer body or 
disconnecting the supply piping. All pipe size 
determinations shall be based on eighty (80) percent 
of the reduced pressure when using Table 6-5. 

608.3 Any water system provided with a check 
valve, backflow preventer, or a pressure-regulating 
device which does not have a bypass feature at its 
source shall be provided with an approved, listed 
adequately sized pressure relief valve or a means to 
control expansion. 

Any water system containing storage water 
heating equipment shall be provided with an 
approved, listed adequately sized combination 
pressure and temperature relief valve, except for 
listed non-storage instantaneous heaters having an 
inside diameter of not more than three (3) inches (80 
mm). Each such approved combination temperature 
and pressure relief valve shall be installed on the 
water-heating device in an approved location based 
on its listing requirements and the manufacturer's 
instructions. Each such combination temperature 
and pressure relief valve shall be provided with a 
drain as required in Section 608.5. 

In addition to the required pressure or 
combination pressure and temperature relief valve, 
an approved, listed expansion tank or other device 
designed for intermittent operation for thermal 
expansion control shall be installed whenever the 
building supply pressure is greater than the required 
relief valve pressure setting or when any device is 
installed that prevents pressure relief through the 
building supply. The tank or device shall be sized in 
accordance with the manufacturer's recommendation. 

608.4 Each pressure relief valve shall be an 
approved automatic type with drain, and each such 
relief valve shall be set at a pressure of not more than 
one hundred fifty (150) pounds per square inch (1035 
kPa). No shutoff valve shall be installed between the 
relief valve and the system or in the drain line. 

608.5 Relief valves located inside a building shall be 
provided with a drain, not smaller than the relief 
valve outlet, of galvanized steel, hard-drawn copper 
piping and fittings, CPVC, or listed relief valve drain 
tube with fittings which will not reduce the internal 
bore of the pipe or tubing (straight lengths as 
opposed to coils) and shall extend from the valve to 
the outside of the building with the end of the pipe 
not more than two (2) feet (610 mm) nor less than six 
(6) inches (152 mm) above the ground or the flood 
level of the area receiving the discharge and pointing 
downward. Such drains may terminate at other 
approved locations. No part of such drain pipe shall 



be trapped or subject to freezing. The terminal end of 
the drain pipe shall not be threaded. 

608.6 Any water-heating device connected to a 
separate storage tank and having valves between 
said heater and tank shall be provided with an 
approved water pressure relief valve. 

608.7 Vacuum Relief Valves. Where a hot-water 
storage tank or an indirect water heater is located at 
an elevation above the fixture outlets in the hot- 
water system, a vacuum relief valve shall be installed 
on the storage tank or heater. 

609.0 Installation, Testing, Unions, and Location. 

609.1 Installation. All water piping shall be 
adequately supported in accordance with Section 
314.0. Burred ends shall be reamed to the full bore of 
the pipe or tube. Changes in direction shall be made 
by the appropriate use of fittings, except that 
changes in direction in copper tubing may be made 
with bends, provided that such bends are made with 
bending equipment which does not deform or create 
a loss in the cross-sectional area of the tubing. 
Changes in direction are allowed with flexible pipe 
and tubing without fittings in accordance with the 
manufacturer's installation instructions. Provisions 
shall be made for expansion in hot-water piping. All 
piping, equipment, appurtenances, and devices shall 
be installed in a workmanlike manner in conformity 
with the provisions and intent of the code. All water 
service yard piping shall be at least twelve (12) 
inches (305 mm) below the average local frost depth. 
The minimum cover shall be twelve (12) inches (305 
mm) below finish grade. 

609.2 Water pipes shall not be run or laid in the 
same trench as building sewer or drainage piping 
constructed of clay or materials which are not 
approved for use within a building unless both of 
the following conditions are met: 

609.2.1 The bottom of the water pipe, at all 
points, shall be at least twelve (12) inches (305 
mm) above the top of the sewer or drain line. 

609.2.2 The water pipe shall be placed on a 
solid shelf excavated at one side of the common 
trench with a minimum clear horizontal distance 
of at least twelve (12) inches (305 mm) from the 
sewer or drain line. 

Water pipes crossing sewer or drainage 
piping constructed of clay or materials which are 
not approved for use within a building shall be 
laid a minimum of twelve (12) inches (305 mm) 
above the sewer or drain pipe. 

609.3 Water piping installed within a building and 
in or under a concrete floor slab resting on the 
ground shall be installed in accordance with the 
following requirements: 



99 



609.3-609.10 



UNIFORM PLUMBING CODE 



609.3.1 Ferrous piping shall have a protective 
coating of an approved type, machine applied 
and conforming to recognized standards. Field 
wrapping shall provide equivalent protection 
and shall be restricted to those short sections 
and fittings necessarily stripped for threading. 
Zinc coating (galvanizing) shall not be deemed 
adequate protection for piping or fittings. 
Approved non-ferrous piping shall not be 
required to be wrapped. 

609.3.2 Copper tubing shall be installed 
without joints where possible. Where joints are 
permitted, they shall be brazed, and fittings shall 
be wrought copper. 

Note: 

For the purpose of this section, "within the 
building" shall mean within the fixed limits of 
the building foundation. 

609.4 Testing. Upon completion of a section or of 
the entire hot and cold water supply system, it shall 
be tested and proved tight under a water pressure 
not less than the working pressure under which it is 
to be used. The water used for tests shall be obtained 
from a potable source of supply. Except for plastic 
piping, a fifty (50) pound per square inch (344.5 kPa) 
air pressure may be substituted for the water test. In 
either method of test, the piping shall withstand the 
test without leaking for a period of not less than 
fifteen (15) minutes. 

609.5 Unions. Unions shall be installed in the water 
supply piping within twelve (12) inches (305 mm) of 
regulating equipment, water heating, conditioning 
tanks, and similar equipment which may require 
service by removal or replacement in a manner 
which will facilitate its ready removal. 

609.6 Location. Except as provided in Section 609.7, 
no building supply shall be located in any lot other 
than the lot which is the site of the building or 
structure served by such building supply. 

609.7 Nothing contained in this code shall be 
construed to prohibit the use of all or part of an 
abutting lot to: 

609.7.1 Provide access to connect a building 
supply to an available public water service when 
proper cause and legal easement not in violation 
of other requirements have been first established 
to the satisfaction of the Authority Having 
Jurisdiction. 

609.7.2 Provide additional space for a building 
supply when proper cause, transfer of 
ownership, or change of boundary not in 
violation of other requirements have been first 
established to the satisfaction of the Authority 
Having Jurisdiction. The instrument recording 



such action shall constitute an agreement with 
the Authority Having Jurisdiction, which shall | 
clearly state and show that the areas so joined or 
used shall be maintained as a unit during the 
time they are so used. Such an agreement shall 
be recorded in the office of the County Recorder 
as a part of the conditions of ownership of said 
properties, and shall be binding on all heirs, 
successors, and assigns to such properties. A 
copy of the instrument recording such 
proceedings shall be filed with the Authority 
Having Jurisdiction. 

609.8 Low Pressure Cutoff Required on Booster 
Pumps for Water Distribution Systems. When a 
booster pump - excluding a fire pump - is connected 
to a water service or underground water pipe, a low- 
pressure cutoff switch on the inlet side of the pump 
shall be installed within five (5) feet (1524 mm) of the 
inlet. The cutoff switch shall be set for not less than 
ten (10) psi (68.9 kPa) or as required by the Authority 
Having Jurisdiction. A pressure gauge shall be 
installed between the shutoff valve and the pump. 

609.9 Disinfection of Potable Water System. New 

or repaired potable water systems shall be disinfected 
prior to use whenever required by the Authority 
Having Jurisdiction. The method to be followed shall 
be that prescribed by the Health Authority or, in case 
no method is prescribed by it, the following: 

609.9.1 The pipe system shall be flushed with 
clean, potable water until only potable water 
appears at the points of outlet. 

609.9.2 The system or parts thereof shall be 
filled with a water-chlorine solution containing 
at least fifty (50) parts per million of chlorine, 
and the system or part thereof shall be valved- 
off and allowed to stand for twenty-four (24) 
hours; or, the system or part thereof shall be 
filled with a water-chlorine solution containing at 
least two hundred (200) parts per million of 
chlorine and allowed to stand for three (3) hours. 

609.9.3 Following the allowed standing time, 
the system shall be flushed with clean, potable 
water until the chlorine residual in the water 
coming from the system does not exceed the 
chlorine residual in the flushing water. 

609.9.4 The procedure shall be repeated if it is 
shown by bacteriological examination made by 
an approved agency that contamination persists 
in the system. 

609.10 Water Hammer. All building water supply 
systems in which quick-acting valves are installed 
shall be provided with devices to absorb the hammer 
caused by high pressures resulting from the quick 
closing of these valves. These pressure-absorbing 



100 



WATER SUPPLY AND DISTRIBUTION 



Table 6-4 



Inch 


mm 


1/2 


15 


3/4 


20 


1 


25 



TABLE 6-4 
Water Supply Fixture Units (WSFU) and l\/linimum Fixture Branch Pipe Sizes' 



Minimum 
Fixture Branch 

Appliances, Appurtenances or Fixtures' Pipe Size" 

Bathtub or Combination Bath/Shower (fill) 1/2" 

3/4" Bathtub Fill Valve 3/4" 

Bidet 1/2" 

Clothes washer 1/2" 

Dental Unit, cuspidor 1/2" 

Dishwasher, domestic 1/2" 

Drinking Fountain or Watercooler 1/2" 

Hose Bibb 1/2" 

Hose Bibb, each additional^ 1/2" 

Lavatory 1/2" 

Lawn Sprinkler, each head' 

Mobile Home, each (minimum) 

Sinks 

Bar 1/2" 

Clinic Faucet 1/2" 

Clinic Flushometer Valve 

with or without faucet 1" 

Kitchen, domestic 1/2" 

Laundry 1/2" 

Service or Mop Basin 1/2" 

Washup, each set of faucets 1/2" 

Shower, per head 1/2" 

Urinal, 1 .0 GPF Flushometer Valve 3/4" 

Urinal, greater than 1 .0 GPF Flushometer Valve 3/4" 

Urinal, flush tank 1/2" 

Washfountain, circular spray 3/4" 

Water Closet, 1 .6 GPF Gravity Tank 1/2" 

Water Closet, 1 .6 GPF Flushometer Tank 1/2" 

Water Closet, 1.6 GPF Flushometer Valve 1" 

Water Closet, greater than 1 .6 GPF Gravity Tank 1/2" 

Water Closet, greater than 1.6 GPF Flushometer Valve 1" 



Private 



Public Assembly' 



4.0 


4.0 


0.0 


10.0 


1.0 




4.0 


4.0 




1.0 


1.5 


1.5 


0.5 


0.5 


2.5 


2.5 


1.0 


1.0 


1.0 


1.0 


1.0 


1.0 


2.0 




1.0 


2.0 




3.0 




8.0 


1.5 


1.5 


1.5 


1.5 


1.5 


3.0 




2.0 


2.0 


2.0 


See Footnote ' 




See Footnote ' 




2.0 


2.0 




4.0 


2.5 


2.5 


2.5 


2.5 


See Footnote ' 




3.0 


5.5 


See Footnote ^ 





0.75 



3.0 

3.5 
3.5 

7.0 



Notes: 

^ Size of the cold branch pipe, or both the hot and cold branch pipes. 

^ Appliances, Appurtenances or Fixtures not included in this Table may be sized by reference to fixtures having a 

similar flow rate and frequency of use. 
^ The listed fixture unit values represent their load on their cold water service. The separate cold water and hot water 

fixture unit value for fixtures having both hot and cold water connections may each be taken as three-quarter ( 3/4) 

of the listed total value of the fixture. 
" The listed minimum supply branch pipe sizes for individual fixtures are the nominal (I.D.) pipe size. 
^ For fixtures or supply connections likely to impose continuous flow demands, determine the required flow in gallons 

per minute (GPM) and add it separately to the demand (in GPM) for the distribution system or portions thereof. 
« Assembly [Public Use (See Table 4-1 )]. 
^ When sizing flushometer systems see Section 610.10. 
^ Reduced fixture unit loading for additional hose bibbs as used is to be used only when sizing total building demand 

and for pipe sizing when more than one hose bibb is supplied by a segment of water distributing pipe. The fixture 

branch to each hose bibb shall be sized on the basis of 2.5 fixture units. 



101 



Table 6-5 



UNIFORM PLUMBING CODE 



TABLE 6-5 
Fixture Unit Table for Determining Water Pipe and Meter Sizes 



Pressure Range - 30 to 45 psi (207 to 310 kPa) 

Meter Building 

and Supply 

Street and 

Service, Branches 

Inches Inches 



3/4 

3/4 

3/4 

1 

3/4 

1 

1-1/2 

1 
1-1/2 
2 
1 
1-1/2 
2 
2 



40 
(12) 

6 
16 
29 
36 



1/2*^ 

3/4 

1 

1 

1-1/4 36 

1-1/4 54 

1-1/4 78 

1-1/2 85 

1-1/2 150 

1-1/2 151 

2 85 

2 220 

2 370 

2-1/2 445 



60 
(18) 

5 

16 

25 

31 

33 

47 

68 

84 

124 

129 

85 

205 

327 

418 



80 
(24) 

4 

14 

23 

27 

31 

42 

57 

79 

105 

129 

85 

190 

292 

390 



100 
(30) 

3 

12 

21 

25 

28 

38 

48 

65 

91 

110 

85 

176 

265 

370 



Maximum Allowable Length in Feet (meters) 



150 
(46) 

2 
9 

17 

20 

24 

32 

38 

56 

70 

80 

85 

155 

217 

330 



200 
(61) 

1 

6 

15 

17 

23 

28 

32 

48 

57 

64 

85 

138 

185 

300 



250 
(76) 

1 

5 

13 

15 

21 

25 

28 

43 

49 

53 

82 

127 

164 

280 



300 
(91) 

1 

5 

12 

13 

19 

23 

25 

38 

45 

46 

80 

120 

147 

265 



400 
(122) 


4 

10 

12 

17 

19 

21 

32 

36 

38 

66 
104 
124 
240 



500 
(152) 



4 

8 

10 

16 

17 

18 

28 

31 

32 

61 

85 

96 

220 



Inch 


mm 


1/2 


15 


3/4 


20 


1 


25 


1-1/4 


32 


1-1/2 


40 


2 


50 


2-1/2 


65 



600 
(183) 



3 

6 

8 
13 
14 
15 
26 
26 
27 
57 
70 
70 
198 



700 
(213) 



2 

6 

6 
12 
12 
12 
22 
23 
23 
52 
61 
61 
175 



800 900 1000 

(244) (274) (305) 



2 2 1 

6 6 6 

6 6 6 

12 11 11 

12 11 11 

12 11 11 

21 20 20 

21 20 20 

21 20 20 

49 46 43 

57 54 51 

57 54 51 

158 143 133 



Pressure Range - 46 to 

3/4 1/2*** 



3/4 
3/4 

1 
3/4 

1 
1-1/2 

1 
1-1/2 

2 

1 
1-1/2 

2 

2 



3/4 

1 

1 
1-1/4 
1-1/4 
1-1/4 
1-1/2 
1-1/2 
1-1/2 

2 

2 

2 
2-1/2 



7 

20 

39 

39 

39 

78 

78 

85 

151 

151 

85 

370 

370 

654 



60 psi 

7 

20 

39 

39 

39 

78 

78 

85 
151 
151 

85 
370 
370 
640 



(317 to 

6 

19 

36 

39 

39 

76 

78 

85 
151 
151 

85 
340 
370 
610 



414 kPa)** 

5 4 



17 

33 

36 

39 

67 

78 

85 

151 

151 

85 

318 

370 

580 



14 

28 

30 

39 

52 

66 

85 

128 

150 

85 

272 

368 

535 



3 

11 

23 

25 

39 

44 

52 

85 

105 

117 

85 

240 

318 

500 



2 

9 

21 

23 

34 

39 

44 

80 

90 

98 

85 

220 

280 



2 
8 

19 
20 
32 
36 
39 
67 
78 
84 
85 
198 
250 



470 440 



1 

6 

17 

18 

27 

30 

33 

55 

62 

67 

85 

170 

205 

400 



1 
5 

14 
15 
25 
27 
29 
49 
52 
55 
85 



1 
4 
12 
12 
22 
24 
24 
41 
42 
42 
85 



150 135 
165 142 
365 335 





4 

10 

10 

19 

20 

20 

37 

38 

38 

85 

123 

123 

315 





3 

9 

9 

19 

19 

19 

34 

35 

35 

85 

110 

110 

285 




3 
8 
8 

17 
17 
17 
32 
32 
32 
83 
102 
102 




3 
8 
8 

16 
16 
16 
30 
30 
30 
80 
94 
94 



267 250 



Pressure Range - Over 60 psi (414 kPa)** 

3/4 1/2*** 7 7 7 6 5 4 

3/4 3/4 20 20 20 20 17 13 

3/4 1 39 39 39 39 35 30 

1 1 39 39 39 39 38 32 

3/4 1-1/4 39 39 39 39 39 39 

1 1-1/4 78 78 78 78 74 62 

1-1/2 1-1/4 78 78 78 78 78 74 

1 1-1/2 85 85 85 85 85 85 
1-1/2 1-1/2 151 151 151 151 151 151 

2 1-1/2 151 151 151 151 151 151 

1 2 85 85 85 85 85 85 
1-1/2 2 370 370 370 370 360 335 

2 2 370 370 370 370 370 370 
2 2-1/2 654 654 654 654 654 650 



3 
11 
27 
29 
39 
53 
65 
85 
130 
142 
85 



3 
10 
24 
26 
39 
47 
54 
85 
113 
122 
85 



305 282 
370 340 
610 570 



2 

8 

21 

22 

34 

39 

43 

81 

88 

98 

85 

244 

288 

510 



1 
7 
17 
18 
28 
31 
34 
64 
73 
82 
85 



1 
6 
14 
14 
26 
26 
26 
51 
51 
64 
85 



212 187 
245 204 
460 430 



1 

6 

13 

13 

25 

25 

25 

48 

51 

51 

85 

172 

172 

404 



1 

5 

12 

12 

23 

23 

23 

46 

46 

46 

85 

153 

153 

380 



1 

4 

12 

12 

22 

22 

22 

43 

43 

43 

85 

141 

141 





4 

11 

11 

21 

21 

21 

40 

40 

40 

85 

129 

129 



356 329 



* Available static pressure after head loss. 

**Building supply, three-quarter (3/4) inch (20 mm) nominal size minimum. 



102 



WATER SUPPLY AND DISTRIBUTION 



Table 6-6 -61 0.5 



Table 6-6 
Minimum Required Air Cliamber Dimensions 



Nominal 




Length 


Flow 


Velocity 


Required 


Air Chamber 


Pipe 




of 


Pressure 


in Ft. 


Vol. in 


Phys. Size 


Diameter 




Pipe (ft.) 


P.S.I.G. 


Per. Sec. 


Cubic Inch 


in Inches 


1/2" 


(15 mm) 


25 


30 


10 


8 


3/4" X 15" 


1/2" 


(15 mm) 


100 


60 


10 


60 


1" X 69.5" 


3/4" 


(20 mm) 


50 


60 


5 


13 


1" X 15" 


3/4" 


(20 mm) 


200 


30 


10 


108 


1.25" X 72.5" 


1" 


(25 mm) 


100 


60 


5 


19 


1.25" X 12.7 " 


1" 


(25 mm) 


50 


30 


10 


40 


1.25" X 27" 


1-1/4" 


(32 mm) 


50 


60 


10 


110 


1.25" X 54" 


1-1/2" 


(40 mm) 


200 


30 


5 


90 


2" X 27" 


1-1/2" 


(40 mm) 


50 


60 . 


10 


170 


2" X 50.5" 


2" 


(50 mm) 


100 


30 


10 


329 


3" X 44.5" 


2" 


(50 mm) 


25 


60 


10 


150 


2.5" X 31" 


2" 


(50 mm) 


200 


60 


5 


300 


3" X 40.5" 



devices shall be either air chambers or approved 
mechanical devices. Water pressure absorbing 
devices shall be installed as close as possible to 
quick-acting valves. 

609.10.1 Air Chambers. When air chambers 
are installed, they shall be in an accessible place, 
and each air chamber shall be provided with an 
accessible means for restoring the air in the 
event that the chamber becomes waterlogged. 
Air chambers shall be sized in accordance with 
Table 6-6. 

609.10.2 Mechanical Devices. When hsted 
mechanical devices are used, the manufacturer's 
specifications as to location and method of 
installation shall be followed. Such mechanical 
devices shall be accessible. 

610.0 Size of Potable Water Piping. 

610.1 The size of each water meter and each 
potable water supply pipe from the meter or other 
source of supply to the fixture supply branches, 
risers, fixtures, connections, outlets, or other uses 
shall be based on the total demand and shall be 
determined according to the methods and 
procedures outlined in this section. Other than 
systems sized by the use of Table 6-5, the system 
shall be designed to assure that the maximum 
velocities allowed by the code and the applicable 
standard are not exceeded. 

610.2 Whenever a water filter, water softener 
backflow prevention device, or similar device is 
installed in any water supply line, the pressure loss 
through such devices shall be included in the 
pressure loss calculations of the system, and the 



water supply pipe and meter shall be adequately 
sized to provide for any such pressure loss. 

No water filter, water softener, backflow 
prevention device, or similar device regulated by this 
code shall be installed in any potable water supply 
piping when the installation of such device produces 
an excessive pressure drop in any such water supply 
piping. In the absence of specific pressure drop 
information, the diameter of the inlet or outlet of any 
such device or its connecting piping shall not be less 
than the diameter of such water distribution piping 
to the fixtures served by the device. 

All such devices shall be of a type approved by 
the Authority Having Jurisdiction and shall be tested 
for flow rating and pressure loss by an approved 
laboratory or recognized testing agency to standards 
consistent with the intent of this chapter. 

61 0.3 The quantity of water required to be supplied 
to every plumbing fixture shall be represented by 
fixture units, as shown in Table 6-4. Equivalent 
fixture values shown in Table 6-4 include both hot 
and cold water demand. 

61 0.4 Systems within the range of Table 6-5 may be 
sized from that table or by the method set forth in 
Section 610.5. 

Listed parallel water distribution systems shall 
be installed in accordance with their listing, but at no 
time shall any portion of the system exceed the 
maximum velocities allowed by the code. 

610.5 Except as provided in Section 610.4, the size of 
each water piping system shall be determined in 
accordance with the procedure set forth in Appendix 
A. For alternate methods of sizing water supply 
systems, see Appendix L. 



103 



610.6-610.0 



UNIFORM PLUMBING CODE 



610.6 Except where the type of pipe used and the 
water characteristics are such that no decrease in 
capacity due to length of service (age of system) may 
be expected, all friction loss data shall be obtained 
from the "Fairly Rough" or "Rough" charts in 
Appendix A of this code. Friction or pressure losses 
in water meter, valve and fittings shall be obtained 
from the same sources. Pressure losses through 
water treating equipment, backflow prevention 
devices, or other flow-restricting devices shall be 
computed as required by Section 610.2. 

610.7 On any proposed water piping installation 
sized using Table 6-5, the following conditions shall 
be determined: 

(1) Total number of fixture units as determined 
from Table 6-4, Equivalent Fixture Units, for 
the fixtures to be installed. 

(2) Developed length of supply pipe from meter 
to most remote outlet. 

(3) Difference in elevation between the meter or 
other source of supply and the highest 
fixture or outlet. 

(4) Pressure in the street main or other source of 
supply at the locality where the installation 
is to be made. 

(5) In localities where there is a fluctuation of 
pressure in the main throughout the day, 
the water piping system shall be designed 
on the basis of the minimum pressure 
available. 

610.8 Size of Meter and Building Supply Pipe 
Using Table 6-5. The size of the meter and the 
building supply pipe shall be determined as follows: 

(1) Determine the available pressure at the 
water meter or other source of supply; 

(2) Subtract one-half (1/2) pound per square 
inch pressure (3.4 kPa) for each foot (305 
mm) of difference in elevation between such 
source of supply and highest water supply 
outlet in the building or on the premises; 

(3) Use the "pressure range" group within 
which this pressure will fall using Table 6-5; 

(4) Select the "length" column which is equal to 
or longer than the required length; 

(5) Follow down the column to a fixture unit 
value equal to or greater than the total 
number of fixture units required by the 
installation; 

(6) Having located the proper fixture unit value 
for the required length, sizes of meter and 
building supply pipe as found in the two 
left-hand columns shall be applied. 

No building supply pipe shall be less 



than three-quarter (3/4) inch (20 mm] 
diameter. 



in 



610.9 Size of Branches. When Table 6-5 is used, 
the minimum size of each branch shall be 
determined by the number of fixture units to be 
served by that branch, the total developed length of 
the system, and the meter and street service size as 
per Section 610.8. No branch piping is required to 
be larger in size than that required by Table 6-5 for 
the building supply pipe. 





Table 6-7 


Flushometer Fixture Units for Water Sizing Using 




Table 6-5 


Fixture Category: Water Closet w/ Flushometer Valves 




Individual 


Fixture Units Assigned 


Number of 


Fixture Units 


for Water Closets and 


Flushometer 


Assigned in 


Similar 10 Unit Fixtures 


Valves 


Decreasing Value 


in Accumulative Values 


1 


40 


40 


2 


30 


70 


3 


20 


90 


4 


15 


105 


5 or more 


10 each 


115 plus 10 for each 

additional fixture 

in excess of 5 


Fixture Category: Urinals w/ Flushometer Valves 




Individual 


Fixture Units Assigned 


Number of 


Fixture Units 


for Urinals and 


Flushometer 


Assigned in 


Similar 5 Unit Fixtures 


Valves 


Decreasing Value 


in Accumulative Values 


1 


20 


20 


2 


15 


35 


3 


10 


45 


4 


8 


53 


5 or more 


\r 5 each 


58 plus 5 for each 

additional fixture 

in excess of 5 



610.10 Sizing for Flushometer Valves. When 
using Table 6-5 to size water supply systems 
serving flushometer valves, the number of 
flushometer fixture units assigned to every section 
of pipe, whether branch or main, shall be 
determined by the number and category of 
flushometer valves served by that section of pipe, in 
accordance with Table 6-7. Piping supplying a 
flushometer valve shall not be less in size than the 
valve inlet. 



104 



WATER SUPPLY AND DISTRIBUTION 



Table 6-7 -611.2 



Sizing Method 
Example Using TABLE 6-7 

Public Use Fixtures 



LAV LAV UR UR WC WC 
I I 1 I I 1_ 



H I 



LAV LAV UR UR WC WC 
I I I I I I 



LAV UR WC LAV UR WC 
I I I I L_l 



Q P O N 



When using Table 6-7 to size water piping, care must 
be exercised to assign flushometer fixture units 
based on the number and category of fixtures served. 
In the example above, fixture units assigned to each 
section of pipe are computed as follows: Note: Each 
capital letter refers to the section of pipe above it, 
unless otherwise shown. 

A: 1WC = 40F.U. 

B: 2 WC = 70 F.U. 

C: 2 WC (70) + 1 UR (20) = 90 F.U. 

D: 2 WC (70) + 2 UR (35) = 105 F.U. 

E: 2 WC (70) + 2 UR (35) + 1 LAV (1) = 106 F.U. 

F: 2 WC (70) + 2 UR (35) + 2 LAV (2) = 107 F.U. 

G: 1 LAV = 1 F.U. 

H: 2 LAV = 2 F.U. 

I: 2 LAV (2) + 1 UR (20) = 22 F.U. 

J: 2 LAV (2)+ 2 UR (35) = 37 F.U. 

K; 2 LAV (2) + 2 UR (35) + 1 WC (40) = 77 F.U. 

L: 2 LAV (2) + 2 UR (35) + 2 WC (70) = 107 F.U. 

M: 4 WC (105) + 4 UR (53) + 4 LAV (4) = 162 F.U. 

N: 1WC = 40F.U. 

O: 1 WC (40) + 1 UR (20) = 60 F.U. 

P: 1 WC (40) + 1 UR (20) + 1 LAV (1) = 61 F.U. 

Q: 2 WC (70) + 1 UR (20) + 1 LAV (1) = 91 F.U. 

R: 2 WC (70) + 2 UR (35) + 1 LAV (1) = 106 F.U. 

S: 2 WC (70) + 2 UR (35) + 2 LAV (2) = 107 F.U. 

T: 6 WC (125) + 6 UR (63) + 6 LAV (6) = 194 F.U. 

610.11 Sizing Systems for Flushometer Tanks. 

The size of branches and mains serving flushometer 
tanks shall be consistent with the sizing procedures 
for flush tank water closets. 



610.12 Sizing for Velocity. Water piping systems 
shall not exceed the maximum velocities listed in this 
section or Appendix A. 

610.12.1 Copper Tube Systems. Maximum 
velocities in copper and copper alloy tube and 
fitting systems shall be limited to a maximum of 
eight (8) feet per second (fps) (2.4 mps) in cold 
water and five (5) fps in hot water (1.52 mps). 

610.12.2 Tubing Systems Using Copper 
Alloy Fittings. Maximum velocities through 
copper alloy fittings in tubing other than copper 
shall be limited to a maximum of eight (8) feet 
per second (fps) (2.4 mps) in cold water and five 
(5) fps in hot water (1.52 mps). 

610.13 Exceptions. The provisions of this section 
relative to size of water piping shall not apply to the 
following: 

(1) Water supply piping systems designed in 
accordance with recognized engineering 
procedures acceptable to the Authority 
Having Jurisdiction. 

(2) Alteration of or minor additions to existing 
installations, provided the Authority Having 
Jurisdiction finds that there will be 
an adequate supply of water to operate all 
fixtures. 

(3) Replacement of existing fixtures or 
appliances. 

(4) Piping which is part of fixture equipment. 

(5) Unusual conditions where, in the judgment 
of the Authority Having Jurisdiction, an 
adequate supply of water is provided to 
operate fixtures and equipment. 

(6) Non-potable water lines as defined in 
Sections 601.2.2 and 601.2.3. 

(7) The size and material of irrigation water 
piping installed outside of any building or 
structure and separated from the potable 
water supply by means of an approved 
airgap or backflow prevention device is not 
regulated by this code. The potable water 
piping system supplying each such 
irrigation system shall be adequately sized 
as required elsewhere in this chapter to 
deliver the full connected demand of both 
the domestic use and the irrigation systems. 

61 1 .0 Drinking Water Treatment Units. 

611.1 Compliance with Standard. Drinking water 
treatment units shall meet the requirements of the 
appropriate standard referenced in Table 14-1. 

611.2 Airgap Discharge. Discharge from all 
drinking water treatment units shall enter the 



105 



611 .3 - Table 6-8 



UNIFORM PLUMBING CODE 



drainage system through an airgap or an airgap 
device which meets the requirements of the 
appropriate standards referenced in Table 14-1. 

611.3 Connection Tubing. The tubing to and from 
drinking water treatment units shall be of a size and 
material as recommended by the manufacturer. The 
tubing shall comply with the requirements of the 
appropriate standards referenced in Table 14-1. 

611.4 Sizing of Residential Softeners. 

Residential-use water softeners shall be sized per 
Table 6-8. 

TABLE 6-8 
Sizing of Residential Water Softeners 



Required Size of 
Softener Connection 



Number of Bathroom 
Groups Served^ 



3/4 in. 
lin. 



up to 2 

.3 

up to 4 



^ Installation of a kitchen sink and dishwasher, 
laundry tray, and automatic clothes washer 
permitted without additional size increase. 

^ An additional water closet and lavatory permitted. 

^ Over four bathroom groups, the softener size shall 
be engineered for the specific installation. 

See also Appendix A, Recommended Rules for Sizing the 
Water Supply System, and Appendix L, Alternate 
Plumbing Systems, for alternate methods of sizing water 
supply systems. 



106 



CHAPTER 7 



SANITARY DRAINAGE 



Part I - Drainage Systems 

701.0 Materials. 

701.1 Drainage piping shall be cast iron, galvanized 
steel, galvanized wrought iron, lead, copper, brass. 
Schedule 40 ABS DWV, Schedule 40 PVC DWV, extra 
strength vitrified clay pipe, or other approved materials 
having a smooth and uniform bore, except that: 

701.1.1 No galvanized wrought iron or 
galvanized steel pipe shall be used underground 
and shall be kept at least six (6) inches (152 mm) 
above ground. 

701.1.2 ABS and PVC DWV piping installations 
shall be installed in accordance with IS 5, IS 9, 
and Chapter 15 "Firestop Protection." Except for 
individual single-family dwelling units, 
materials exposed within ducts or plenums shall 
have a flame-spread index of not more than 25 
and a smoke-developed index of not more than 
50, when tested in accordance with the Test for 
Surface - Burning Characteristics of the Building 
Materials. (See the Building Code standards 
based on ASTM E-84 and ANSI/UL 723.) 

701.1.3 No vitrified clay pipe or fittings shall 
be used above ground or where pressurized 
by a pump or ejector. They shall be kept at 
least twelve (12) inches (305 mm) below 
ground. 

701.1.4 Copper tube for drainage and vent 
piping shall have a weight of not less than that 
of copper drainage tube type DWV. 

701.2 Drainage fittings shall be of cast iron, 
malleable iron, lead, brass, copper, ABS, PVC, 
vitrified clay, or other approved materials having a 
smooth interior waterway of the same diameter as 
the piping served, and all such fittings shall be 
compatible with the type of pipe used. 

701.2.1 Fittings on screwed pipe shall be of 
the recessed drainage type. Burred ends shall be 
reamed to the full bore of the pipe. 

701 .2.2 The threads of drainage fittings shall be 
tapped so as to allow one-quarter (1/4) inch per 
foot (20.9 mm/m) grade. 

701.2.3 Fittings used for drainage shall be of 
the drainage type, have a smooth interior 
waterway, and be constructed so as to allow one 
fourth (1/4) inch per foot (20.9 mm/m) grade. 



701.3 Lead. 

See Table 14-1. Sheet lead shall be not less than the 
following: 

For safe pans - not less than four (4) pounds per 
square foot (19.5 kg/m^) or 1/16 inch (1.6 mm) thick. 

For flashings or vent terminals - not less 
than three (3) pounds per square foot (15 kg/m^) or 
1.2 mm thick. 

Lead bends and lead traps shall not be less than 
one-eighth (1/8) inch (3.2 mm) wall thickness. 



TABLE 7-1 
Caulking Ferrules 



Pipe Size 
(inches) 



Inside 
Diameter 
(inches) 



Length 
(inches) 



IVninimum 

Weight Each 

lb. oz. 



2 


2-1/4 


4-1/2 


1 





3 


3-1/4 


4-1/2 


1 


12 


4 


4-1/4 


4-1/2 


2 


8 



Caulking Ferrules (Metric) 


Pipe Size 
(mm) 


Inside 
Diameter Length 
(mm) (mm) 


Minimum 

Weight Each 

(kg) 


50 
80 
100 


57 114 
83 114 
108 114 


0.454 
0.790 
1.132 


TABLE 7-2 
Soldering Bushings 


Pipe Size 
(inches) 


Minimum 
Weight Each Pipe Size 
Lb. oz. (inches) 


Minimum 

Weight Each 

Lb. oz. 


1-1/4 
1-1/2 

2 


6 2-1/2 
8 3 
14 4 


1 6 

2 

3 8 


Soldering Bushings (Metric) 


Pipe Size 
(mm) 


Minimum 
Weight Each Pipe Size 
(l<g) (mm) 


Minimum 

Weight Each 

(kg) 



32 


0.168 


65 


0.622 


40 


0.224 


80 


0.908 


50 


0.392 


100 


1.586 



107 



Table 7-3 



UNIFORM PLUMBING CODE 



Inch 


mm 


1-1/4 


32 


1-1/2 


40 


2 


50 


2-1/2 


65 


3 


80 



TABLE 7-3 
Drainage Fixture Unit Values (DFU) 

Min. Size 

Trap and 

Plumbing Appliance, Appurtenance, or Fixture Trap Arm' 

Bathtub or Combination Bath/Shower 1-1/2" 

Bidet 1-1/4" 

Bidet 1-1/2" 

Clothes Washer, domestic, standpipe' 2" 

Dental Unit, cuspidor 1-1/4" 

Dishwasher, domestic, with independent drain 1-1/2"' 

Drinking Fountain or Watercooler (per head) 1-1/4" 

Food-waste-grinder, commercial 2" 

Floor Drain, emergency 2" 

Floor Drain (for additional sizes see Section 702) 2" 

Shower single head trap 2" 

Multi-head, each additional 2" 

Lavatory, single 1-1/4" 

Lavatory in sets of two or three 1-1/2" 

Washfountain 1-1/2" 

Washfountain 2" 

Mobile Home, trap 3" 

Receptor, indirect waste'' 1-1/2" 

Receptor, indirect waste" 2" 

Receptor, indirect waste' 3" 

Sinks 

Bar 1-1/2" 

Bar 1-1/2"' 

Clinical 3" 

Commercial with food waste 1-1/2"' 

Special Purpose 1-1/2" 

Special Purpose 2" 

Special Purpose 3" 

Kitchen, domestic 1-1/2"' 

(with or without food-waste-grinder and/or dishwasher) 

Laundry 1-1/2" 

(with or without discharge from a clothes washer) 

Service or Mop Basin 2" 

Service or Mop Basin .3" 

Service, flushing rim 3" 

Wash, each set of faucets 

Urinal, integral trap 1 .0 GPF' 2" 

Urinal, integral trap greater than 1.0 GPF 2" 

Urinal, exposed trap 1-1/2"' 

Water Closet, 1 .6 GPF Gravity Tank' 3" 

Water Closet, 1 .6 GPF Flushometer Tank' 3" 

Water Closet, 1 .6 GPF Flushometer Valve' 3" 

Water Closet, greater than 1 .6 GPF Gravity Tank' 3" 

Water Closet, greater than 1 .6 GPF Flushometer Valve' 3" 

' Indirect waste receptors shall be sized based on the total drainage capacity of the fixtures that drain therein to, in accordance with Table 7-4. 

^ Provide a 2" (51 mm) minimum drain. 

^ For refrigerators, coffee urns, water stations, and similar low demands. 

" For commercial sinks, dishwashers, and similar moderate or heavy demands. 

= Buildings having a clothes washing area with clothes washers in a battery of three (3) or more clothes washers shall be rated at six (6) fixture units each for 

purposes of sizing common horizontal and vertical drainage piping. 
^ Water closets shall be computed as six (6) fixture units when determining septic tank sizes based on Appendix K of this code. 
' Trap sizes shall not be increased to the point where the fixture discharge may be inadequate to maintain their self-scouring properties. 
^ Assembly [Public Use (See Table 4-1)]. 



Private 


Public 


Asserr 


2.0 


2.0 




1.0 






2.0 






3.0 


3.0 


3.0 




1.0 


1.0 


2.0 


2.0 


2.0 


0.5 


0.5 


1.0 




3.0 


3.0 




0.0 


0.0 


2.0 


2.0 


2.0 


2.0 


2.0 


2.0 


1.0 


1.0 


1.0 


1.0 


1.0 


1.0 


2.0 


2.0 


2.0 




2.0 


2.0 




3.0 


3.0 


12.0 








See footnote ^ ^ 




See footnote ^-^ 




See footnote ' 


1.0 








2.0 


2.0 




6.0 


6.0 




3.0 


3.0 


2.0 


3.0 


3.0 


3.0 


4.0 


4.0 




6.0 


6.0 


2.0 


2.0 





2.0 



2.0 



2.0 





3.0 


3.0 




3.0 


3.0 




6.0 


6.0 




2.0 


2.0 


2.0 


2.0 


5.0 


2.0 


2.0 


6.0 


2.0 


2.0 


5.0 


3.0 


4.0 


6.0 


3.0 


4.0 


6.0 


3.0 


4.0 


6.0 


4.0 


6.0 


8.0 


4.0 


6.0 


8.0 



108 



SANITARY DRAINAGE 



701.4-704.4 



701.4 Ferrules and Bushings 

701 .4.1 Caulking ferrules shall be manufactured 
from bronze or copper and shall be in 
accordance with Table 7-1. 

701 .4.2 Soldering bushings shall be of bronze 
or copper in accordance with Table 7-2. 

702.0 Fixture Unit Equivalents. 

The unit equivalent of plumbing fixtures shown in 
Table 7-3 shall be based on the size of the trap 
required, and the unit equivalent of fixtures and 
devices not shown in Table 7-3 .shall be based on the 
rated discharge capacity in gpm (gallons per minute) 
(liters per second) in accordance with Table 7-4. 

Maximum trap loadings for sizes up to four (4) 
inches (102 mm) are as follows: 

1-1/4 in. (32 mm) — 1 unit 

1-1/2 in. (40 mm) — 3 units 

2 in. (50 mm) — 4 units 

3 in. (80 mm) — 6 units 

4 in. (100 mm) — 8 units 

Exception: On self-service laundries. 

703.0 Size of Drainage Piping. 

703.1 The minimum sizes of vertical and/or 
horizontal drainage piping shall be determined from 
the total of all fixture units connected thereto, and 
additionally, in the case of vertical drainage pipes, in 
accordance with their length. 

703.2 Table 7-5 shows the maximum number of 
fixture units allowed on any vertical or horizontal 
drainage pipe, building drain or building sewer of a 
given size; the maximum number of fixture units 
allowed on any branch interval of a given size; and 
the maximum length (in feet and meters) of any 
vertical drainage pipe of a given size. 

TABLE 7-4 

Discharge Capacity in Gallons per Minute 
(Liters per Second) 

For Intermittent Flow Only 



GPM 



(L/sec) 



Up to 7-1/2 (Up to 0.47) Equals 1 Unit 

8 to 15 (0.50 to 0.95) Equals 2 Units 

16 to 30 (1.00 to 1.89) Equals 4 Units 

31 to 50 (1.95 to 3.15) Equals 6 Units 

Discharge capacity for over 50 gallons per minute 
(3.15 L/sec.) shall be determined by the Authority 
Having Jurisdiction. 



For a continuous flow into a drainage system, 
such as from a pump, sump ejector, air conditioning 
equipment, or similar device, two (2) fixture units 
shall be allowed for each gallon per minute (0.06 
L/sec.) of flow. 

703.3 For alternate method of sizing drainage 
piping, see Appendix L. 

704.0 Fixture Connections (Drainage). 

704.1 Drainage piping shall be provided with 
approved inlet fittings for fixture connections, 
correctly located according to the size and type of 
fixture proposed to be connected. 

704.2 Two fixtures set back-to-back, or side-by-side, 
within the distance allowed between a trap and its 
vent may be served by a single vertical drainage pipe 
provided that each fixture wastes separately into an 
approved double-fixture fitting having inlet 
openings at the same level. 

704.3 Pot sinks, scullery sinks, dishwashing sinks, 
silverware sinks, commercial dishwashing machines, 
silverware-washing machines, and other similar 
fixtures shall be connected directly to the drainage 
system. A floor drain shall be provided adjacent to 
the fixture, and the fixture shall be connected on the 
sewer side of the floor drain trap, provided that no 
other drainage line is connected between the floor 
drain waste connection and the fixture drain. The 
fixture and floor drain shall be trapped and vented 
as required by this code. 

704.4 Closet Rings (Closet Flanges). 

704.4.1 Closet rings (closet flanges) for water 
closets or similar fixtures shall be of an 
approved type and shall be bronze, copper, hard 
lead, cast iron, galvanized malleable iron, ABS, 
PVC, or other approved materials. Each such 
closet ring (closet flange) shall be approximately 
seven (7) inches (175 mm) in diameter and, when 
installed, shall, together with the soil pipe, 
present a one and one-half (1-1/2) inch (38 mm) 
wide flange or face to receive the fixture gasket 
or closet seal. 

704.4.2 Caulked-on closet rings (closet flanges) 
shall be not less than one-fourth (1 /4) inch (6.4 
mm) thick and not less than two (2) inches (51 
mm) in overall depth. 

704.4.3 Closet rings (closet flanges) shall be 
burned or soldered to lead bends or stubs, shall 
be caulked to cast iron soil pipe, shall be solvent 
cemented to ABS and PVC, and shall be screwed 
or fastened in an approved manner to other 
materials. 



109 



Table 7-5 -705.1 



UNIFORM PLUMBING CODE 



TABLE 7-5 

Maximum Unit Loading and Maximum Length of Drainage and Vent Piping 



Size of Pipe, Inches 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


5 


6 


8 


10 


12 


(mm) 


(32) 


(40) 


(50) 


(65) 


(80) 


(100) 


(125) 


(150) 


(200) 


(250) 


(300) 


IVIaximum Units 
























Drainage Piping' 
























Vertical 


1 


2= 


16' 


32' 


48' 


256 


600 


1380 


3600 


5600 


8400 


Horizontal 


1 


1 


8' 


14' 


35' 


216' 


428' 


720' 


2640' 


4680' 


8200' 


l\/laximum Length 
























Drainage Piping 
























Vertical, feet 


45 


65 


85 


148 


212 


300 


390 


510 


750 






(m) 


(14) 


(20) 


(26) 


(45) 


(65) 


(91) 


(119) 


(155) 


(228) 






Horizontal (Unlimited) 
























Vent Piping (See note) 






















Horizontal and Vertical 
























Maximum Units 


1 


83 


24 


48 


84 


256 


600 


1380 


3600 






Maximum Lengths, feet 


45 


60 


120 


180 


212 


300 


390 


510 


750 






(m) 


(14) 


(18) 


(37) 


(55) 


(65) 


(91) 


(119) 


(155) 


(228) 







' Excluding trap arm. 

^ Except sinks, urinals and dishwashers. 

^ Except six-unit traps or water closets. 

" Only four (4) water closets or six-unit traps allowed on any vertical pipe or stack; and not to exceed three (3) water closets 

or six-unit traps on any horizontal branch or drain. 

^ Based on one-fourth (1/4) inch per foot (20.9 mm/m) slope. For one-eighth (1/8) inch per foot (10.4 mm/m) slope, multiply 

horizontal fixture units by a factor of 0.8. 

Note: The diameter of an individual vent shall not be less than one and one-fourth (1-1/4) inches (31 .8 mm) nor less than 
one-half (1/2) the diameter of the drain to which it is connected. Fixture unit load values for drainage and vent piping shall 
be computed from Tables 7-3 and 7-4. Not to exceed one-third (1/3) of the total permitted length of any vent may be 
installed in a horizontal position. When vents are increased one (1) pipe size for their entire length, the maximum length 
limitations specified in this table do not apply. 



704.4.4 All such closet rings (closet flanges) 
shall be adequately designed and secured to 
support fixtures connected thereto. 

704.4.5 Closet screws, bolts, washers, and 
similar fasteners shall be of brass, copper, or 
other listed, equally corrosion-resistant 
materials. All such screws and bolts shall be of 
adequate size and number to properly support 
the fixture installed. 

705.0 Joints and Connections. 

705.1 Types of Joints. 

705.1.1 Caulked Joints. Caulked joints for cast 
iron bell-and-spigot soil pipe and other similar 
joints shall be firmly packed with oakum or 
hemp and filled with molten lead to a depth of 
not less than one (1) inch (25.4 mm). The lead 
shall be caulked thoroughly at the inside and 
outside edges of the joint. After caulking, the 
finished joint shall not extend more than one- 
eighth (1/8) inch (3.2 mm) below the rim of the 
hub. No paint, varnish, or other coatings shall be 
permitted on the joining material until after the 
joint has been tested and approved. Caulked 



joints in cast iron bell-and-spigot water piping 
shall be made with nontoxic materials. 

705.1.2 Cement IWortar Joints. Except for 
repairs and connections to existing lines 
constructed with such joints, cement mortar 
joints shall be prohibited on building sewers. 

705.1.3 Burned Lead Joints. Burned (welded) 
lead joints shall be lapped, and the lead shall be 
fused together to form a uniform weld at least as 
thick as the lead being joined. 

705.1.4 Asbestos Cement Sewer Pipe Joints. 

Joints in asbestos cement pipe shall be a sleeve 
coupling of the same composition as the pipe or 
of other approved materials, and sealed with 
rubber rings or joined by an approved type 
compression coupling. Joints between asbestos 
cement pipe and other approved pipe shall be 
made by means of an approved adapter coupling. 

705.1.5 Packing Additives Prohibited. The 

addition of leak-sealing additives to joint packing 
shall be prohibited. 

705.1.6 l\/lolded Rubber Coupling Joints. When 
pipe is joined by means of molded rubber 
coupling joints, such joints shall conform to 



110 



SANITARY DRAINAGE 



705.1 -707.4 



approved standards and shall not be considered 
as slip joints. When required, appropriate rubber 
bushings shall be used to allow for any 
difference in piping material diameters. 

705.1.7 Elastomeric Gasketed and Rubber-Ring 
Joints. Elastomeric gasketed and rubber-ring 
joints shall comply with the applicable 
Installation Standard listed in Appendix I. 

705.1.8 Shielded Coupling Joints. When piping 
systems are joined by means of shielded 
couplings, such couplings shall conform to 
approved standards and shall not be considered 
as slip joints. 

705.1.9 Hubless Cast-Iron Pipe Joints. Joints for 
hubless cast iron soil pipe and fittings shall 
conform to appropriate Installation Standards 
listed in Appendix I and shall not be considered 
as slip joints. 

705.2 Use of Joints. 

705.2.1 Clay and Sewer Pipe. Joints in vitrified 
clay pipe or between such pipe and metal pipe 
shall be made as provided in Section 316.1.5, 
705.1.2, 705.1.6, or 705.1.8. 

705.2.2 Cast-Iron Pipe. Joints in cast-iron pipe 
shall be made as provided in Section 316.1.1, 
316.1.5, 606.1.2, 705.1.1, 705.1.8 or 705.1.9. 

705.2.3 Screw Pipe to Cast Iron. Joints between 
wrought iron, steel, brass, or copper pipe and cast 
iron pipe shall be either caulked or threaded 
joints made as provided in Section 316.1.1 or 
705.1.1, or shall be made with approved adapter 
fittings. 

705.2.4 Lead to Cast Iron, Wrought Iron, or 
Steel. Joints between lead and cast iron, 
wrought iron, or steel pipe shall be made by 
means of wiped joints to a caulking ferrule, 
soldering nipple, or bushing as provided in 
Section 316.1.2. 

705.3 Special Joints. 

705.3.1 Slip Joints. In fixture drains and traps, 
slip joints of approved materials may be used in 
accordance with their approvals. 

705.3.2 Expansion Joints. Expansion joints 
shall be accessible, except when in vent piping 
or drainage stacks, and may be used where 
necessary to provide for expansion and 
contraction of the pipes. 

705.3.3 Ground Joint, Flared, or Ferrule 
Connections. Brass or copper ground joint, 
flared, or ferrule type connections which allow 
adjustment of tubing, but provide a rigid joint 
when made up, shall not be considered as slip 
joints. 



706.0 Changes in Direction of Drainage Flow. 

706.1 Changes in direction of drainage piping shall 
be made by the appropriate use of approved fittings 
and shall be of the angles presented by a one- 
sixteenth (1/16) bend, one-eighth (1/8) bend, or one- 
sixth (1/6) bend, or other approved fittings of 
equivalent sweep. 

706.2 Horizontal drainage lines, coiinecting with a 
vertical stack, shall enter through forty-five (45) 
degree (0.79 rad) wye branches, sixty (60) degree 
(1.05 rad) wye branches, combination wye and 1/8 
bend branches, sanitary tee or sanitary tapped tee 
branches, or other approved fittings of equivalent 
sweep. No fitting having more than one (1) inlet at 
the same level shall be used unless such fitting is 
constructed so that the discharge from one (1) inlet 
cannot readily enter any other inlet. Double sanitary 
tees may be used when the barrel of the fitting is at 
least two (2) pipe sizes larger than the largest inlet, 
(pipe sizes recognized for this purpose are 2 in., 2- 
1/2 in., 3 in., 3-1 /2 in., 4 in., 4-1/2 in., 5 in., 6 in., etc.) 
(50, 65, 80, 90, 100, 115, 125, 150 mm, etc.). 

706.3 Horizontal drainage lines connecting with 
other horizontal drainage lines shall enter 
through forty-five (45) degree (0.79 rad) wye 
branches, combination wye and one-eighth (1/8) 
bend branches, or other approved fittings of 
equivalent sweep. 

706.4 Vertical drainage lines connecting with 
horizontal drainage lines shall enter through forty- 
five (45) degree (0.79 rad) wye branches, combination 
wye and one-eighth (1/8) bend branches, or other 
approved fittings of equivalent sweep. Sixty (60) 
degree (1.05 rad) branches or offsets may be used 
only when installed in a true vertical position. 

707.0 Cleanouts. 

707.1 Each cleanout fitting for cast iron pipe shall 
consist of a cast iron or brass body and an approved 
plug. Each cleanout for galvanized wrought iron, 
galvanized steel, copper, or brass pipe shall consist 
of a brass plug as specified in Table 7-6, or a 
standard weight brass cap, or an approved ABS or 
PVC plastic plug. Plugs shall have raised square 
heads or approved countersunk rectangular slots. 

707.2 Each cleanout fitting and each cleanout plug 
or cap shall be of an approved type. Materials used 
for cleanouts shall conform to approved standards 
acceptable to the Authority Having Jurisdiction. | 

707.3 Cleanouts shall be designed to be gas and 
watertight. 

707.4 Each horizontal drainage pipe shall be 
provided with a cleanout at its upper terminal and 



111 



707.4 - 708.0 



UNIFORM PLUMBING CODE 



each run of piping, which is more than one hundred 
(100) feet (30,480 mm) in total developed length, 
shall be provided with a cleanout for each one 
hundred (100) feet (30,480 mm), or fraction thereof, 
in length of such piping. 

Exceptions: 

(1) Cleanouts may be omitted on a horizontal 
drain line less than five (5) feet (1524 mm) in 
length unless such line is serving sinks or 
urinals. 

(2) Cleanouts may be omitted on any horizontal 
drainage pipe installed on a slope of 
seventy-two (72) degrees (1.26 rad) or less 
from the vertical angle (angle of one-fifth 

(1/5) bend). 

(3) Excepting the building drain and its 
horizontal branches, a cleanout shall not be 
required on any pipe or piping which is 
above the floor level of the lowest floor of 
the building. 

(4) An approved type of two-way cleanout 
fitting, installed inside the building wall 
near the connection between the building 
drain and building sewer or installed 
outside of a building at the lower end of a 
building drain and extended to grade, may 
be substituted for an upper terminal 
cleanout. 

707.5 An additional cleanout shall be provided in a 
drainage line for each aggregate horizontal change of 
direction exceeding one hundred and thirty-five (135) 
degrees (2.36 rad). 

707.6 Each cleanout shall be installed so that it opens 
to allow cleaning in the direction of flow of the soil or 
waste or at right angles thereto and, except in the case 
of wye branch and end-of-line cleanouts, shall be 
installed vertically above the flow line of the pipe. 

707.7 Each cleanout extension shall be considered as 
drainage piping and each ninety (90) degree (1.6 rad) 
cleanout extension shall be extended from a wye-type 
fitting or other approved fitting of equivalent sweep. 

707.8 Each cleanout for an interceptor shall be 
outside of such interceptor. 

707.9 Each cleanout, unless installed under an 
approved cover plate, shall be above grade, readily 
accessible, and so located as to serve the purpose for 
which it is intended. Cleanouts located under cover 
plates shall be so installed as to provide the clearances 
and accessibility required by this section. 

707.10 Each cleanout in piping two (2) inches (50 
mm) or less in size shall be so installed that there is a 
clearance of not less than twelve (12) inches (305 
mm) in front of the cleanout. Cleanouts in piping 
larger than two (2) inches (50 mm) shall have a 



clearance of not less than eighteen (18) inches (457 
mm) in front of the cleanout. Cleanouts in underfloor 
piping shall be extended to or above the finished 
floor or shall be extended outside the building when 
there is less than eighteen (18) inches (457 mm) 
vertical overall, allowing for obstructions such as 
ducts, beams, and piping and thirty (30) inches (762 
mm) horizontal clearance from the means of access 
to such cleanout. No underfloor cleanout shall be 
located more than twenty (20) feet (6096 mm) from 
an access door, trap door, or crawl hole. 

707.1 1 Cleanout fittings shall be not less in size than 
those given in Table 7-6. 

707.12 Cleanouts shall be provided for pressure 
drainage systems as classified under Section 710.7. 

Table 7-6 
Cleanouts 



Size of Pipe 


Size of Cleanout 


Threads 


(inches) 


(inches) 


(per inches) 


1-1/2 


1-1/2 


11-1/2 


2 


1-1/2 


11-1/2 


2-1/2 


2-1/2 


8 


3 


2-1/2 


8 


4 & larger 


3-1/2 


8 




TABLE 7-6 






Cleanouts (Metric) 




Size of Pipe 


Size of Cleanout 


Threads 


(mm) 


(mm) 


(per 25.4 mm) 


40 


38 


11-1/2 


50 


38 


11-1/2 


65 


64 


8 


80 


64 


8 


100 & larger 


89 


8 



707.13 Countersunk cleanout plugs shall be 
installed where raised heads may cause a hazard. 

707.14 When a hubless blind plug is used for a 
required cleanout, the complete coupling and plug 
shall be accessible for removal or replacement. 

708.0 Grade of Horizontal Drainage Piping. 

Horizontal drainage piping shall be run in practical 
alignment and a uniform slope of not less than one- 
fourth (1/4) inch per foot (20.9 mm/m) or two (2) 
percent toward the point of disposal provided that, 
where it is impractical due to the depth of the street 
sewer or to the structural features or to the 
arrangement of any building or structure to obtain a 



112 



SANITARY DRAINAGE 



708.0-710.9 



slope of one-fourth (1/4) of an inch per foot (20.9 
mm/m) or two (2) percent, any such pipe or piping 
four (4) inches (100 mm) or larger in diameter may 
have a slope of not less than one-eighth (1/8) of an 
I inch per foot (10.5 mm/m) or one (1) percent, when 
first approved by the Authority Having Jurisdiction. 

709.0 Gravity Drainage Required. 

Wherever practicable, all plumbing fixtures shall be 
drained to the public sewer or private sewage 
disposal system by gravity. 

710.0 Drainage of Fixtures Located Below the Next 
Upstream l\/lanhole or Below the Main Sewer Level. 

710.1 Drainage piping serving fixtures which have 
flood-level rims located below the elevation of the next 
upstream manhole cover of the public or private sewer 
serving such drainage piping shall be protected from 
backflow of sewage by installing an approved type of 
backwater valve. Fixtures above such elevation shall 
not discharge through the backwater valve. 

710.2 Drainage piping serving fixtures that are 
located below the crown level of the main sewer 
shall discharge into an approved watertight sump or 
receiving tank, so located as to receive the sewage or 
wastes by gravity. From such sump or receiving 
tank, the sewage or other liquid wastes shall be lifted 
and discharged into the building drain or building 
sewer by approved ejectors, pumps, or other equally 
efficient approved mechanical device. 

710.3 A sewage ejector or sewage pump receiving 
the discharge of water closets or urinals: 

710.3.1 Shall have a minimum discharge 
capacity of twenty (20) gallons (75.7 liters) per 
minute. 

710.3.2 In single dwelling units, the ejector or 
pump shall be capable of passing a one and one- 
half (1-1/2) inch (38 mm) diameter solid ball, 
and the discharge piping of each ejector or 
pump shall have a backwater valve and gate 
valve, and be a minimum of two (2) inches (51 
mm) in diameter. 

710.3.3 In other than single-dwelling units, the 
ejector or pump shall be capable of passing a 
two (2) inch (51 mm) diameter solid ball, and the 
discharge piping of each ejector or pump shall 
have a backwater valve and gate valve, and be a 
minimum of three (3) inches (80 mm) in 
diameter. 

71 0.4 The discharge line from such ejector, pump, or 
other mechanical device shall be provided with an 
accessible backwater or swing check valve and gate 
or ball valve. If the gravity drainage line to which 
such discharge line connects is horizontal, the 



method of connection shall be from the top through 
a wye branch fitting. The gate or ball valve shall be 
located on the discharge side of the backwater or 
check valve. 

Gate or ball valves, when used on drainage 
work, shall be fullway type with working parts of 
corrosion-resistant metal. Sizes four (4) inches 
(100mm) or more in diameter shall have cast-iron 
bodies, and sizes less than four (4) inches (100 mm), 
cast iron or brass bodies. 

710.5 Building drains or building sewers receiving 
discharge from any pump or ejector shall be 
adequately sized to prevent overloading. Two (2) 
fixture units shall be allowed for each gallon per 
minute (0.06 L/s) of flow. 

710.6 Backwater valves, gate valves, fullway ball 
valves, unions, motors, compressors, air tanks, and 
other mechanical devices required by this section 
shall be located where they will be accessible for 
inspection and repair at all times and, unless 
continuously exposed, shall be enclosed in a 
masonry pit fitted with an adequately sized 
removable cover. 

Backwater valves shall have bodies of cast iron, 
plastic, brass, or other approved materials; 
noncorrosive bearings, seats, and self-aligning discs; 
and shall be constructed so as to insure a positive 
mechanical seal. Such backwater valves shall remain 
sufficiently open during periods of low flows to avoid 
screening of solids and shall not restrict capacities or 
cause excessive turbulence during peak loads. Unless 
otherwise listed, valve access covers shall be bolted 
type with gasket, and each valve shall bear the 
manufacturer's name cast into body and cover. 

710.7 The drainage and venting systems in 
connection with fixtures, sumps, receiving tanks, and 
mechanical waste-lifting devices, shall be installed 
under the same requirements as provided for in this 
code for gravity systems. 

71 0.8 Sumps and receiving tanks shall be watertight 
and shall be constructed of concrete, metal, or other 
approved materials. If constructed of poured concrete, 
the walls and bottom shall be adequately reinforced 
and designed to recognized acceptable standards. 
Metal sumps or tanks shall be of such thickness as to 
serve their intended purpose and shall be treated 
internally and externally to resist corrosion. 

710.9 All such sumps and receiving tanks shall be 
automatically discharged and, when in any "public 
use" occupancy, shall be provided with dual pumps 
or ejectors arranged to function alternately in normal 
use and independently in case of overload or 
mechanical failure. The pumps shall have an audio 
and visual alarm, readily accessible, that signals 



113 



710.9-712.3 



UNIFORM PLUMBING CODE 



pump failure or an overload condition. The lowest 
inlet shall have a minimum clearance of two (2) 
inches (51 mm) from the high-water or "starting" 
level of the sump. 

710.10 Sumps and receiving tanks shall be provided 
with substantial covers having a bolt and gasket type 
manhole or equivalent opening to permit access for 
inspection, repairs, and cleaning. The top shall be 
provided with a vent pipe which shall extend 
separately through the roof or, when permitted, m.ay 
be combined with other vent pipes. Such vent shall 
be large enough to maintain atmospheric pressure 
within the sump under all normal operating 
conditions and, in no case, shall be less in size than 
that required by Table 7-b for the number and type 
of fixtures discharging into the sump, nor less than 
one and one-half (1-1/2) inches (40 mm) in diameter. 
When the foregoing requirements are met and the 
vent, after leaving the sump, is combined with vents 
from fixtures discharging into the sump, the size of 
the combined vent need not exceed that required for 
the total number of fixtures discharging into the 
sump. No vent from an air-operating sewage ejector 
shall combine with other vents. 

710.1 1 Air tanks shall be so proportioned as to be of 
equal cubical capacity to the ejectors connected 
therewith in which there shall be maintained an air 
pressure of not less than two (2) pounds for each foot 
(3 kg for each m) of height the sewage is to be raised. 
No water operated ejectors shall be permitted. 

710.12 When subsoil drainage systems are installed, 
such systems shall be discharged into an approved 
sump or receiving tank and shall be discharged in a 
manner satisfactory to the Authority Having 
Jurisdiction. 

I 710.13 Grinder Pump Ejector. With the approval of 
the Authority Having Jurisdiction, a grinder pump 
may be used. 

710.14 Macerating Toilet Systems. Listed 
macerating toilet systems shall be permitted as an 
alternate to a sewage pump system for single 
I bathrooms for private use when approved by the 
Authority Having Jurisdiction. 

710.14.1 Sumps. The sump shall be water- and 
gastight. 

710.14.2 Discharge Piping. The discharge 
piping shall be sized per manufacturer's 
instructions and shall be not less than 3/4 in. (20 
mm) in diameter. The developed length of the 
discharge piping shall not exceed manufacturer's 
recommendations. A check valve and fullway- 
type shutoff valve shall be located within the 
discharge line or internally within the device. 

710.14.3 Venting. The plumbing fixtures which 



discharge into the macerating device shall be 
vented per this code. The sump shall be vented 
per manufacturer's instructions and such vent 
shall be permitted to connect to the fixture 
venting. 

711.0 Suds Relief. 

Drainage connections shall not be made into a 
drainage piping system within eight (8) feet (2438 
mm) of any vertical to horizontal change of direction 
of a stack containing suds-producing fixtures. 
Bathtubs, laundries, washing machine standpipes, 
kitchen sinks, and dishwashers shall be considered 
suds-producing fixtures. Where parallel vent stacks 
are required, they shall connect to the drainage stack 
at a point eight (8) feet (2438 nim) above the lowest 
point of the drainage stack. 

Exceptions: 

(1) Single-family residences. 

(2) Stacks receiving the discharge from less than 
three (3) stories of plumbing fixtures. 

712.0 Testing. 

712.1 Media. The piping of the plumbing, drainage, 
and venting systems shall be tested with water or air " 
except that plastic pipe shall not be tested with air. | 
The Authority Having Jurisdiction may require the 
removal of any cleanouts, etc., to ascertain whether 
the pressure has reached all parts of the system. 
After the plumbing fixtures have been set and their 
traps filled with water, they shall be submitted to a 
final test. 

712.2 Water Test. The water test shall be applied to 
the drainage and vent systems either in its entirety or 
in sections. If the test is applied to the entire system, 
all openings in the piping shall be tightly closed, 
except the highest opening, and the systeni filled 
with water to point of overflow. If the system is 
tested in sections, each opening shall be tightly 
plugged except the highest opening of the section 
under test, and each section shall be filled with water, 
but no section shall be tested with less than a ten (10) 
foot (3048 mm) head of water. In testing successive 
sections, at least the upper ten (10) feet (3048 mm) of 
the next preceding section shall be tested, so that no 
joint or pipe in the building (except the uppermost 
ten (10) feet (3048 mm) of the system) shall have been 
submitted to a test of less than a ten (10) foot (3048 
mm) head of water. The water shall be kept in the 
system, or in the portion under test, for at least fifteen 
(15) minutes before inspection starts. The system shall 
then be tight at all points. 

712.3 Air Test. The air test shall be made by 
attaching an air compressor testing apparatus to any 



114 



SANITARY DRAINAGE 



712.3-716.0 



suitable opening and, after closing all other inlets 
and outlets to the system, forcing air into the system 
until there is a uniform gauge pressure of five (5) 
pounds per square inch (34.5 kPa) or sufficient to 
balance a column of mercury ten (10) inches (254 
mm) in height. The pressure shall be held without 
introduction of additional air for a period of at least 
fifteen (15) minutes. 

Part II - Building Sewers. 

713.0 Sewer Required. 

71 3.1 Every building in which plumbing fixtures are 
installed and every premises having drainage piping 
thereon, shall have a connection to a public or 
private sewer, except as provided in Sections 
101.4.1.3, 713.2 and 713.4. 

713.2 When no public sewer intended to serve any 
lot or premises is available in any thoroughfare or 
right of way abutting such lot or premises, drainage 
piping from any building or works shall be connected 
to an approved private sewage disposal system. 

713.3 Within the limits prescribed by Section 713.4 
hereof, the rearrangement or subdivision into smaller 
parcels of a lot which abuts and is served by a public 
sewer shall not be deemed cause to permit the 
construction of a private sewage disposal system, and 
all plumbing or drainage systems on any such smaller 
parcel or parcels shall connect to the public sewer. 

713.4 The public sewer may be considered as not 
being available when such public sewer or any 
building or any exterior drainage facility connected 
thereto is located more than two hundred (200) feet 
(60.8 m) from any proposed building or exterior 
drainage facility on any lot or premises which abuts 
and is served by such public sewer. 

713.5 No permit shall be issued for the installation, 
alteration, or repair of any private sewage disposal 
system, or part thereof, on any lot for which a 
connection with a public sewer is available. 

713.6 On every lot or premises hereafter connected 
to a public sewer, all plumbing and drainage systems 
or parts thereof on such lot or premises shall be 
connected with such public sewer. 

Exception: Single-family dwellings and 
buildings or structures accessory thereto, 
existing and connected to an approved private 
sewage disposal system prior to the time of 
connecting the premises to public sewer may, 
when no hazard, nuisance, or insanitary 
condition is evidenced and written permission 
has been obtained from the Authority Having 
Jurisdiction, remain connected to such properly 



maintained private sewage disposal system 
when there is insufficient grade or fall to permit 
drainage to the sewer by gravity. 

714.0 Damage to Public Sewer or Private Sewage 
Disposal System. 

714.1 It shall be unlawful for any person to deposit, 
by any means whatsoever, into any plumbing fixture, 
floor drain, interceptor, sump, receptor, or device 
which is connected to any drainage system, public 
sewer, private sewer, septic tank, or cesspool, any 
ashes, cinders, solids, rags, flammable, poisonous, or 
explosive liquids or gases, oils, grease, and any other 
thing whatsoever which would or could cause 
damage to the public sewer, private sewer, or private 
sewage disposal system. 

714.2 No rain, surface, or subsurface water shall be 
connected to or discharged into any drainage I 
system, unless first approved by the Authority I 
Having Jurisdiction. 

714.3 No cesspool, septic tank, seepage pit, or 
drainfield shall be connected to any public sewer or 
to any building sewer leading to such public sewer. 

714.4 No commercial food-waste grinder shall be 
connected to a private sewage disposal systeni 
unless permission has first been obtained from the | 
Authority Having Jurisdiction. 

714.5 An approved type watertight sewage or waste 
water holding tank, the contents of which, due to 
their character, must be periodically removed and 
disposed of at some approved off-site location, shall 
be installed only when required by the Authority 
Having Jurisdiction or the Health Officer to prevent 
anticipated surface or subsurface contamination or 
pollution, damage to the public sewer, or other 
hazardous or nuisance condition. 



715.0 Building Sewer Materials. 

715.1 The building sewer, beginning two (2) feet 
(610 mm) from any building or structure, shall be of 
such materials as may be approved by the Authority 
Having Jurisdiction under the approval procedures 
set forth in Chapter 3 of this code. 

715.2 Joining methods and materials shall be as 
prescribed in this code. 

715.3 - (See TIA on page vii). 

716.0 IVIarkings. 

All pipe, brick, block, prefabricated septic tanks, 
prefabricated septic tank or seepage pit covers, or 
other parts or appurtenances incidental to the 
installation of building sewers or private sewage 



115 



716.0-720.0 



UNIFORM PLUMBING CODE 



disposal systems shall conforin to the approval 
requirements of Chapter 3 of this code and shall be 
I marked and identified in a manner satisfactory to the 
Authority Having Jurisdiction. 

717.0 Size of Building Sewers. 

The minimum size of any building sewer shall be 
determined on the basis of the total number of 
fixture units drained by such sewer, in accordance 
with Table 7-8. No building sewer shall be smaller 
than the building drain. 

For alternate methods of sizing building sewers, 
see Appendix L. 

718.0 Grade, Support, and Protection of Building 
Sewers. 

718.1 Building sewers shall be run in practical 
alignment and at a uniform slope of not less than 
one-fourth (1/4) of an inch per foot (20.9 mm/m) 
toward the point of disposal. 

Exception: When approved by the Authority 
Having Jurisdiction and where it is impractical, 
due to the depth of the street sewer or to the 
structural features or to the arrangement of any 
building or structure, to obtain a slope of one- 
fourth (1/4) of an inch per foot (20.9 mm/m), 
any such pipe or piping four (4) inches (100 mm) 
through six (6) inches (150 mm) may have a 
slope of not less than one-eighth (1/8) inch per 
foot (10.5 mm/m) and any such piping eight (8) 
inches (200 mm) and larger may have a slope of 
not less than one-sixteenth (1/16) of an inch per 
foot (5.3 mm/m). 

718.2 Building sewer piping shall be laid on a firm 
bed throughout its entire length, and any such 
piping laid in made or filled-in ground shall be laid 
on a bed of approved materials and shall be 

I adequately supported to the satisfaction of the 
Authority Having Jurisdiction. 

718.3 No building sewer or other drainage piping or 
part thereof, which is constructed of materials other 
than those approved for use under or within a 
building, shall be installed under or within two (2) 
feet (610 mm) of any building or structure, or part 
thereof, nor less than one (1) foot (305 mm) below the 
surface of the ground. The provisions of this 
subsection include structures such as porches and 
steps, whether covered or uncovered, breezeways, 
roofed porte cocheres, roofed patios, carports, 
covered walks, covered driveways, and similar 
structures or appurtenances. 

719.0 Cleanouts. 



719.1 Cleanouts shall be placed inside the building 
near the connection between the building drain and 
the building sewer or installed outside the building 
at the lower end of the building drain and extended 
to grade. 

Additional building sewer cleanouts shall be 
installed at intervals not to exceed one hundred (100) 
feet (30,480 mm) in straight runs and for each 
aggregate horizontal change in direction exceeding 
one hundred thirty-five (135) degrees (2.36 rad). 

719.2 When a building sewer or a branch thereof does 
not exceed ten (10) feet (3048 mm) in length and is a 
straight-line projection from a building drain which is 
provided with a cleanout, no cleanout will be required 
at its point of connection to the building drain. 

71 9.3 All required building sewer cleanouts shall be 
extended to grade and shall comply with all 
appropriate sections of Cleanouts, Section 707.0, for 
sizing, construction and materials. When building 
sewers are located under buildings, the cleanout 
requirements of Section 707.0 shall apply. 

71 9.4 Each cleanout shall be installed so that it opens 
to allow cleaning in the direction of flow of the soil or 
waste or at right angles thereto and, except in the case 
of wye branch and end-of-line cleanouts, shall be 
installed vertically above the flow line of the pipe. 

719.5 Cleanouts installed under concrete or asphalt 
paving shall be made accessible by yard boxes or by 
extending flush with paving with approved materials 
and shall be adequately protected. 

719.6 Approved manholes may be installed in lieu 
of cleanouts when first approved by the Authority 
Having Jurisdiction. The maximum distance 
between manholes shall not exceed three hundred 
(300) feet (91.4 m). 

The inlet and outlet connections shall be made 
by the use of a flexible compression joint no closer 
than twelve (12) inches (305 mm) to and not farther 
than three (3) feet (914 mm) from the manhole. No 
flexible compression joints shall be embedded in the 
manhole base. 

720.0 Sewer and Water Pipes. 

Building sewers or drainage piping of clay or materi- 
als which are not approved for use within a building 
shall not be run or laid in the same trench as the 
water pipes unless both of the following 
requirements are met: 

(1) The bottom of the water pipe, at all points, 
shall be at least twelve (12) inches (305 mm) 
above the top of the sewer or drain line. 

(2) The water pipe shall be placed on a solid 
shelf excavated at one side of the common 



116 



SANITARY DRAINAGE 



720.0 - Table 7-7 



trench with a minimum clear horizontal 
distance of at least twelve (12) inches (305 
mm) from the sewer or drain line. 

Water pipes crossing sewer or drainage 
piping constructed of clay or materials 
which are not approved for use within a 
building shall be laid a minimum of twelve 
(12) inches (305 mm) above that sewer or 
drain pipe. 

Note: 

For the purpose of this section, "within the 
building" shall mean within the fixed limits of 
the building foundation. 

721.0 Location. 

721.1 Except as provided in Section 721.2, no 
building sewer shall be located in any lot other than 
the lot which is the site of the building or structure 



served by such sewer nor shall any building sewer 
be located at any point having less than the 
minimum distances indicated in Table 7-7. 

721.2 Nothing contained in this code shall be 
construed to prohibit the use of all or part of an 
abutting lot to: 

(1) Provide access to connect a building sewer to an 
available public sewer when proper cause and 
legal easement not in violation of other 
requirements has been first established to the 
satisfaction of the Authority Having Jurisdiction. 

(2) Provide additional space for a building sewer 
when proper cause, transfer of ownership, or 
change of boundary not in violation of other 
requirements has been first established to the 
satisfaction of the Authority Having Jurisdiction. 
The instrument recording such action shall 
constitute an agreement with the Authority 
Having Jurisdiction and shall clearly state and 



TABLE 7-7 
Minimum IHorizontal Distance Required From Building Sewer 

Buildings or structures' 2 feet (610 mm) 

Property line adjoining private 

property Clear' 

Water supply wells 50 feet' (15,240 mm) 

Streams 50 feet (15,240 mm) 

On-site domestic water 

service line 1 foot' (305 mm) 

Public water main 10 feet" (3,048 mm) 

Note: 

' Including porches and steps, whether covered or uncovered, breezeways, roofed portecocheres, roofed patios, carports, 
covered walks, covered driveways, and similar structures or appurtenances. 

^ See also Section 31 3.3. 

^ All drainage piping shall clear domestic water supply wells by at least fifty (50) feet (15240 mm). This distance may be reduced 
to not less than twenty-five (25) feet (7620 mm) when the drainage piping is constructed of materials approved for use within a 
building. 

' See Section 720.0. 

= For parallel construction. 

® For crossings, approval by the Health Department or Authority Having Jurisdiction shall be required. 



TABLE 7-8 
l\/laximum/l\/linimum Fixture Unit Loading on Building Sewer Piping 



Size of Pipe, 
Inches (mm) 

6 and smaller (150) 

8 (200) 

10 (250) 

12 (300) 



Slope, Inches per Foot (mm/m) 
1/16(5.3) 1/8(10.5) 1/4(20.9) 

(As specified in Table 7-5/No minimum loading) 
1 ,950/1 ,500 2,800/625 3,900/275 

3,400/1 ,600 4,900/675 6,800/300 

5,600/1 ,700 8,000/725 1 1 ,200/325 



See also Appendix K, Private Sewage Disposal Systems. For alternate methods of sizing drainage piping, see 
Appendix L. 



117 



721.2-723.0 



UNIFORM PLUMBING CODE 



show that the areas so joined or used shall be 
maintained as a unit during the time they are so 
used. Such an agreement shall be recorded in the 
office of the County Recorder as part of the 
conditions of ownership of said properties, and 
shall be binding on all heirs, successors, and 
assigns to such properties. A copy of the 
instrument recording such proceedings shall be 
filed with the Authority Having Jurisdiction. 

722.0 Abandoned Sewers and Sewage Disposal 
Facilities. 

722.1 Every abandoned building (house) sewer, or 
part thereof, shall be plugged or capped in an 
approved manner within five (5) feet (1524 mm) of 
the property line. 

722.2 Every cesspool, septic tank, and seepage pit 
which has been abandoned or has been discontinued 
otherwise from further use or to which no waste or 
soil pipe from a plumbing fixture is connected shall 
have the sewage removed therefrom and be 
completely filled with earth, sand, gravel, concrete, 
or other approved material. 

722.3 The top cover or arch over the cesspool, septic 
tank, or seepage pit shall be removed before filling, 
and the filling shall not extend above the top of the 
vertical portions of the sidewalls or above the level 
of any outlet pipe until inspection has been called 
and the cesspool, septic tank, or seepage pit has been 
inspected. After such inspection, the cesspool, septic 
tank, or seepage pit shall be filled to the level of the 
top of the ground. 

722.4 No person owning or controlling any cesspool, 
septic tank, or seepage pit on the premises of such 
person or in that portion of any public street, alley, or 
other public property abutting such premises, shall 
fail, refuse, or neglect to comply with the provisions 
of this section or upon receipt of notice so to comply 
from the Authority Having Jurisdiction. 

722.5 Where disposal facilities are abandoned 
consequent to connecting any premises with the 
public sewer, the permittee making the connection 
shall fill all abandoned facilities as required by the 
Authority Having Jurisdiction within thirty (30) days 
from the time of connecting to the public sewer. 

723.0 Building Sewer Test. 

Building sewers shall be tested by plugging the end 
of the building sewer at its points of cormection with 
the public sewer or private sewage disposal system 
and completely filling the building sewer with water 
from the lowest to the highest point thereof, or by 
approved equivalent low-pressure air test. The 
building sewer shall be watertight at all points. 



118 



CHAPTER 8 

INDIRECT WASTES 



801.0 Indirect Wastes. 

801.1 Alrgap or Airbreak Required. All indirect 
waste piping shall discharge into the building 
drainage system through an airgap or airbreak as set 
forth in this code. Where a drainage airgap is 
required by this code, the minimum vertical distance 
as measured from the lowest point of the indirect 
waste pipe or the fixture outlet to the flood-level rim 
of the receptor shall be not less than one (1) inch 
(25.4 mm). 

801.2 Food and Beverage Handling 
Establishments. Establishments engaged in the 
storage, preparation, selling, serving, processing, or 
other handling of food and beverage involving the 
following equipment which requires drainage shall 
provide indirect waste piping for refrigerators, 
refrigeration coils, freezers, walk-in coolers, iceboxes, 
ice-making machines, steam tables, egg boilers, 
coffee urns and brewers, hot-and-cold drink 
dispensers, and similar equipment. 

801.2.1 Except for refrigeration coils and ice- 
making machines, the minimum size of the 
indirect waste pipe shall not be smaller than the 
drain on the unit, but shall not be smaller than 
one (1) inch (25 mm), and the maximum 
developed length shall not exceed fifteen (15) 
feet (4572 mm). Indirect waste pipe for ice- 
making machines shall not be less than the drain 
on the unit, but shall not be less than three- 
quarters (3/4) inch (20 mm). 

801 .2.2 For walk-in coolers, floor drains may be 
connected to a separate drainage line 
discharging into an outside receptor. The flood- 
level rim of the receptor shall be a minimum of 
six (6) inches (152 mm) lower than the lowest 
floor drain. Such floor drains shall be trapped 
and individually vented. Cleanouts shall be 
provided at every ninety (90) degree (1.6 rad) 
turn and shall be accessibly located. Such waste 
shall discharge through an airgap or airbreak 
into a trapped and vented receptor, except that a 
full-size airgap is required where the indirect 
waste pipe may be under vacuum. 

801 .2.3 Food preparation sinks, steam kettles, 
potato peelers, ice cream dipper wells, and 
similar equipment shall be indirectly connected 
to the drainage system by means of an airgap. 
Bins, sinks, and other equipment having 
drainage connections and used for the storage of 



unpackaged ice used for human ingestion, or 
used in direct contact with ready-to-eat food, 
shall be indirectly connected to the drainage 
system by means of an airgap. Each indirect 
waste pipe from food-handling fixtures or 
equipment shall be separately piped to the 
indirect waste receptor and shall not combine 
with other indirect waste pipes. The piping from 
the equipment to the receptor shall not be 
smaller than the drain on the unit, and it shall 
not be smaller than one-half (1/2) inch (15 mm). I 

801.3 Bar and Fountain Sink Traps. Where the 
sink in a bar, soda fountain, or counter is so located 
that the trap serving the sink cannot be vented, the 
sink drain shall discharge through an airgap or 
airbreak (see Section 801.2.3) into an approved 
receptor which is vented. The developed length from 
the fixture outlet to the receptor shall not exceed five 
(5) feet (1524 mm). 

801.4 Connections from Water Distribution 
System. Indirect waste connections shall be 
provided for drains, overflows, or relief pipes from 
potable water pressure tanks, water heaters, boilers, 
and similar equipment which is connected to the 
potable water distribution system. Such indirect 
waste connections shall be made by means of a water 
distribution airgap constructed in accordance with 
Table 6-3. 

801.5 Sterilizers. Lines, devices, or apparatus such 
as stills, sterilizers, and similar equipment requiring 
waste corinections and used for sterile materials shall 
be indirectly connected by means of an airgap. Each 
such indirect waste pipe shall be separately piped to 
the receptor and shall not exceed fifteen (15) feet 
(4572 mm). Such receptors shall be located in the 
same room. 

801.6 Drip or Drainage Outlets. Appliances, 
devices, or apparatus not regularly classed as 
plumbing fixtures, but which have drip or drainage 
outlets, may be drained by indirect waste pipes 
discharging into an open receptor through either an 
airgap or airbreak (see Section 801.2.1). 

802.0 Approvals. 

No plumbing fixtures served by indirect waste pipes 
or receiving discharge therefrom shall be installed 
until first approved by the Authority Having 
Jurisdiction. 



119 



803.0 - 808.0 



UNIFORM PLUMBING CODE 



803.0 Indirect Waste Piping. 

Except as hereinafter provided, the size and 
construction of indirect waste piping shall be in 
accordance with other sections of this code 
applicable to drainage and vent piping. No vent 
from indirect waste piping shall combine with any 
sewer connected vent, but shall extend separately to 
the outside air. Indirect waste pipes exceeding five 
(5) feet (1524 mm), but less than fifteen (15) feet (4572 
mm) in length shall be directly trapped, but such 
traps need not be vented. 

Indirect waste pipes less than fifteen (15) feet 
(4572 mm) in length shall not be less than the 
diameter of the drain outlet or tailpiece of the fixture, 
appliance, or equipment served, and in no case less 
than one-half (1/2) inch (15 mm) in size. Angles and 
changes of direction in such indirect waste pipes 
shall be provided with cleanouts so as to permit 
flushing and cleaning. 

804.0 Indirect Waste Receptors. 

804.1 All plumbing fixtures or other receptors 
receiving the discharge of indirect waste pipes shall be 
approved for the use proposed and shall be of such 
shape and capacity as to prevent splashing or flooding 
and shall be located where they are readily accessible 
for inspection and cleaning. No standpipe receptor for 
any clothes washer shall extend more than thirty (30) 
inches (762 mm), nor less than eighteen (18) inches 
(457 mm) above its trap. No trap for any clothes 
washer standpipe receptor shall be installed below the 
floor, but shall be roughed in not less than six (6) 
inches (152 mm) and not more than eighteen (18) 
inches (457 mm) above the floor. No indirect waste 
receptor shall be installed in any toilet room, closet, 
cupboard, or storeroom, nor in any other portion of a 
building not in general use by the occupants thereof; 
except standpipes for clothes washers may be 
installed in toilet and bathroom areas when the 
clothes washer is installed in the same room. 

804.2 Where water service connections are installed 
for a clothes washer, an approved method of waste 
disposal shall be provided. 

805.0 Pressure Drainage Connections. 

Indirect waste connections shall be provided for 
drains, overflows, or relief vents from the water 
supply system, and no piping or equipment carrying 
wastes or producing wastes or other discharges 
under pressure shall be directly connected to any 
part of the drainage system. 

The foregoing shall not apply to any approved 
sump pump or to any approved pressure-wasting 
plumbing fixture or device when the Authority 
Having Jurisdiction has been satisfied that the 



drainage system is adequately sized to accommodate 
the anticipated discharge thereof. 

806.0 Sterile Equipment. 

Appliances, devices, or apparatus such as stills, 
sterilizers, and similar equipment requiring water 
and waste and used for sterile materials shall be 
drained through an airgap. 

807.0 Appliances. 

807.1 Appliances, devices, equipment, or other 
apparatus not regularly classed as plumbing fixtures 
which are equipped with pumps, drips, or drainage 
outlets may be drained by indirect waste pipes 
discharging into an approved type of open receptor. 

807.2 When the condensate waste from air- 
conditioning coils discharges by direct cormection to 
a lavatory tailpiece or to an approved accessible inlet 
on a bathtub overflow, the connection shall be 
located in the area controlled by the same person 
controlling the air-conditioned space. 

807.3 When undiluted condensate waste from a 
fuel-burning condensing appliance is discharged 
into the drainage system, the material in the 
drainage system shall be cast iron, galvanized iron, 
plastic, or other materials approved for this use. 

Exceptions: 

(1) When the above condensate is discharged to 
an exposed fixture tailpiece and trap, such 
tailpiece and trap may be brass. 

(2) Any materials approved in Section 701.0 
may be used when, in the opinion of the 
Authority Having Jurisdiction, condensate I 
waste from a fuel-burning condensing 
appliance is diluted either before or 
after discharge into the drainage system. 

807.4 No domestic dish-washing machine shall be 
directly connected to a drainage system or food 
waste disposer without the use of an approved 
dishwasher airgap fitting on the discharge side of the 
dish-washing machine. Listed airgaps shall be 
installed with the flood level (FL) marking at or 
above the flood level of the sink or drainboard, 
whichever is higher. 

808.0 Cooling Water. 

When permitted by the Authority Having 
Jurisdiction, clean running water used exclusively as a 
cooling medium in an appliance, device, or apparatus 
may discharge into the drainage system through the 
inlet side of a fixture trap in the event that a suitable 
fixture is not available to receive such discharge. Such 
trap connection shall be by means of a pipe connected 
to the inlet side of an approved fixture trap, the upper 



120 



INDIRECT WASTES 



808.0-811.2 



end terminating in a funnel-shaped receptacle set 
adjacent, and not less than six (6) inches (152 mm) 
above the overflow rim of the fixture. 



water removed from the boiler or boilers connected 
thereto when the normal water level of such boiler or 
boilers is reduced not less tiKan four (4) inches (102 mm). 



809.0 Drinking Fountains. 

Drinking fountains may be installed with indirect 
wastes. 

810.0 Steam and IHot Water Drainage 
Condensers and Sumps. 

810.1 No steam pipe shall be directly connected to 
any part of a plumbing or drainage system, nor shall 
any water having a temperature above one hundred 
and forty (140)°F (60°C) be discharged under 
pressure directly into any part of a drainage system. 
Pipes from boilers shall discharge by means of 
indirect waste piping, as determined by the 

I Authority Having Jurisdiction or the boiler 
manufacturer's recommendations. Such pipes may 
be indirectly connected by discharging into an open 
or closed condenser or an intercepting sump of an 
approved type that will prevent the entrance of 
steam or such water under pressure into the 
drainage system. All closed condensers or sumps 
shall be provided with a vent which shall be taken 
off the top and extended separately, full size above 
the roof. All condensers and sumps shall be properly 
trapped at the outlet with a deep seal trap extending 
to within six (6) inches (152 mm) of the bottom of the 
tank. The top of the deep seal trap shall have a three- 
fourths (3/4) inch (19.1 mm) opening located at the 
highest point of the trap to serve as a siphon breaker. 
Outlets shall be taken off from the side in such a 
manner as to allow a water line to be maintained that 
will permanently occupy not less than one-half (1/2) 
the capacity of the condenser or sump. All inlets 
shall enter above the water line. Wearing plates or 
baffles shall be installed in the tank to protect the 
shell. The sizes of the blowoff line inlet, the water 
outlets, and the vent shall be as shown in Table 8-1. 
The contents of condensers receiving steam or hot 
water under pressure must pass through an open 
sump before entering the drainage systeni. 

810.2 Sumps, condensers, or intercepting tanks 
which are constructed of concrete shall have walls 
and bottom not less than four (4) inches (102 mm) in 
thickness, and the inside shall be cement plastered 
not less than one-half (1/2) inch (12.7 mm) in 
thickness. Condensers constructed of metal shall be 
not less than No. 12 U.S. Standard gauge (0.109 inch) 
(2.77 mm), and all such metal condensers shall be 
protected from external corrosion by an approved 
bituminous coating. 

810.3 Sumps and condensers shall be provided with 
suitable means of access for cleaning and shall 
contain a volume of not less than twice the volimie of 



TABLE 8-1 

Pipe Connections in Blowoff Condensers and 
Sumps 



Boiler Blowoff 



Water Outlet 



Vent 



3/4 in.* (20 mm) 3/4 in.* (20 mm) 2 in. (50 mm) 

lin. (25 mm) 1 in. (25 mm) 2-1/2 in. (65 mm) 

1-1/4 in. (32 mm) 1-1/4 in. (32 mm) 3 in. (80 mm) 

1-1/2 in. (40 mm) 1-1/2 in. (40 mm) 4 in. (100 mm) 

2 in. (50 mm) 2 in. (50 mm) 5 in. (125 mm) 

2-1/2 in. (65 mm) 2-1/2 in. (65 mm) 6 in. (150 mm) 

*To be used only with boilers of 100 square feet (9.29 
m^) of heating surface or less. 

810.4 Strainers. Every indirect waste interceptor 
receiving discharge-containing particles that would 
clog the receptor drain shall have a readily 
removable beehive strainer. 

81 1 .0 Chemical Wastes. 

81 1 .1 Chemical or industrial liquid wastes which are 
likely to damage or increase maintenance costs on the 
sanitary sewer system, detrimentally affect sewage 
treatment, or contaminate surface or subsurface waters 
shall be pretreated to render them innocuous prior to 
discharge into a drainage system. Detailed plans and 
specifications of the pretreatment facilities shall be 
required by the Authority Having Jurisdiction. | 

Piping conveying industrial, chemical, or 
process wastes from their point of origin to sewer- 
connected pretreatment facilities shall be of such 
material and design as to adequately perform its 
intended function to the satisfaction of the Authority 
Having Jurisdiction. Drainage discharge piping from 
pretreatment facilities or interceptors shall conform 
to standard drainage installation procedures. 

Copper tube shall not be used for chemical or 
industrial wastes as defined in this section. 

811.2 Each waste pipe receiving or intended to 
receive the discharge of any fixture into which acid or 
corrosive chemical is placed and each vent pipe 
connected thereto shall be constructed of chemical- 
resistant glass, high-silicon iron pipe, or lead pipe with 
a wall thickness of not less than one-eighth (1/8) inch 
(3.2 mm), an approved type of ceramic glazed or 



121 



811.2-815.3 



UNIFORM PLUMBING CODE 



unglazed vitrified day, or other approved corrosion- 
resistant materials. 

811.3 All jointing materials shall be of approved 
type and quality. 

81 1 .4 Wherever practicable, all piping shall be 
readily accessible and installed with the maximum of 
clearance from other services. 

81 1 .5 The owner shall make and keep a permanent 
record of the location of all piping and venting 
carrying chemical waste. 

81 1 .6 No chemical vent shall intersect vents for other 
services. 

81 1 .7 No chemical wastes shall be discharged into 
the ground, local sewer, or other means without 
approval of the local Authority Having Jurisdiction. 

811.8 The provisions in this section relative to 
materials and methods of construction shall not 
apply to installations such as photographic or X-ray 
dark rooms or research or control laboratories 
where minor amounts of adequately diluted 
chemicals are discharged. 

812.0 Clear Water Wastes. 

Water lifts, expansion tanks, cooling jackets, 
sprinkler systems, drip or overflow pans, or similar 
devices which discharge clear wastewater into the 
building drainage system shall discharge through an 
indirect waste. 

813.0 Swimming Pools. 

Pipes carrying wastewater from swimming or 
wading pools, including pool drainage and 
backwash from filters, shall be installed as an 
indirect waste. Where a pump is used to discharge 
waste pool water to the drainage system, the pump 
discharge shall be installed as an indirect waste. 

814.0 RESERVED 

815.0 Condensate Wastes and Control. 

815.1 Condensate Disposal. Condensate from air 
washers, air cooling coils, fuel-burning condensing 
appliances, the overflow from evaporative coolers 
and similar water-supplied equipment or similar air- 
conditioning equipment shall be collected and 
discharged to an approved plumbing fixture or 
disposal area. If discharged into the drainage system, 
equipment shall drain by means of an indirect waste 
pipe. The waste pipe shall have a slope of not less 
than 1/8 inch per foot (10.5 mm/m) or one percent 
slope and shall be of approved corrosion-resistant 
material not smaller than the outlet size as required 
in either Section 310.3 or 310.4 below for air-cooling 



coils or condensing fuel-burning applian'ces, 
respectively. Condensate or wastewater shall not 
drain over a public way. 

815.2 Size. Air-conditioning condensate waste 
pipes shall be independent of any drainage and 
waste system and shall not be smaller than shown in 
Table 8-2. 

TABLE 8-2 
Minimum Condensate Pipe Size 



Equipment Capacity 


Minimum Condensate 


in Tons of 


Pipe Diameter 


Refrigeration (kW) 


in Inches 


(mm) 


Up to 20 (Up to 70.34) 


3/4 


(20) 


21-40 (73.85-140.67) 


1 


(25) 


41-90 (144.19-316.6) 


1-1/4 


(32) 


91-125 (320.03-439.6) 


1-1/2 


(40) 


126-250 (443.12-879.2) 


2 


(50) 



The size of condensate waste pipes may be for 
one unit or a combination of units, or as 
recommended by the manufacturer. The capacity of 
waste pipes assumes a one-eighth (1/8) inch per foot 
(10.5 mm/m) or one percent slope, with the pipe 
running three-quarters (3/4) full at the following 
conditions: 



Outside Air - 20% 
DB WB 

90°F 73°F 
(32°C) (23°C) 



Room Air - 
DB WB 

75°F 62.5°F 
(24°C) (17°) 



Condensate drain sizing for other slopes or other 
conditions shall be approved by the Authority 
Having Jurisdiction. 

Air-conditioning waste pipes shall be 
constructed of materials specified in Chapter 7. 

815.3 Point of Discharge. Air-conditioning 
condensate waste pipes shall connect indirectly to the 
drainage system through an airgap or airbreak to: 

81 5.3.1 A properly trapped receptor or 

815.3.2 Other points of discharge acceptable to 
the Authority Having Jurisdiction, including dry 
wells, leach pits, the tailpiece of plumbing fixtures, 
and so on. 

815.3.3 Condensate or waste water shall not 
drain over a public way. 



122 



CHAPTER 9 

VENTS 



901 .0 Vents Required. 

Each plumbing fixture trap, except as otherwise 
provided in this code, shall be protected against 
siphonage and back-pressure, and air circulation 
shall be ensured throughout all parts of the drainage 
system by means of vent pipes installed in 
accordance with the requirements of this chapter and 
as otherwise required by this code. 

902.0 Vents Not Required. 

902.1 Where permitted by the Authority Having 
Jurisdiction, vent piping may be omitted on an 
interceptor when such interceptor acts as a primary 
settling tank and discharges through a horizontal 
indirect waste pipe into a secondary interceptor. 
The second interceptor shall be properly trapped 
and vented. 

902.2 Traps serving sinks which are part of the 
equipment of bars, soda fountains, and counters 
need not be vented when the location and 
construction of such bars, soda fountains, and 
counters is such as to make it impossible to do so. 
When such conditions exist, said sinks shall 
discharge by means of approved indirect waste pipes 
into a floor sink or other approved type of receptor. 

903.0 l\/laterials. 

903.1 Vent pipe shall be cast iron, galvanized steel, 
galvanized wrought iron, copper, brass. Schedule 40 
ABS DWV, Schedule 40 PVC DWV, or other 
approved materials having a smooth and uniform 
bore except that: 

903.1.1 No galvanized wrought iron or 
galvanized steel pipe shall be used underground 
and shall be kept at least six (6) inches (152 mm) 
above ground. 

903.1 .2 ABS and PVC DWV piping installations 
shall be installed in accordance with IS 5, IS 9 
and Chapter 15 "Firestop Protection." Except 
for individual single-family dwelling units, 
materials exposed within ducts or plenums shall 
have a flame-spread index of not more than 25 
and a smoke-developed index of not more than 
50 when tested in accordance with the Test for 
Surface-Burning Characteristics of the Building 
Materials (See the Building Code standards 
based on ASTM E-84 and ANSI/UL 723.). 



903.2 Use of Copper Tubing. 

903.2.1 Copper tube for underground drainage 
and vent piping shall have a weight of not less 
than that of copper drainage tube type DWV. 

903.2.2 Copper tube for aboveground drainage 
and vent piping shall have a weight of not less 
than that of copper drainage tube type DWV. 

903.2.3 Copper tube shall not be used for 
chemical or industrial wastes as defined in 
Section 811.0. 

903.2.4 In addition to the required incised 
marking, all hard-drawn copper tubing shall be 
marked by means of a continuous and indelibly 
colored stripe at least one quarter (1/4) inch (6.4 
mm) in width, as follows: Type K, green; Type L, 
blue; Type M, red; Type DWV, yellow. 

903.3 Vent fittings shall be cast iron, galvanized 
malleable iron or galvanized steel, copper, brass, 
ABS, PVC, or other approved materials, except that 
no galvanized malleable iron or galvanized steel 
fittings shall be used underground and shall be kept 
at least six (6) inches (152 mm) above ground. 

903.4 Changes in direction of vent piping shall be 
made by the appropriate use of approved fittings, 
and no such pipe shall be strained or bent. Burred 
ends shall be reamed to the full bore of the pipe. 

904.0 Size of Vents. 

904.1 The size of vent piping shall be determined 
from its length and the total number of fixture units 
connected thereto, as set forth in Table 7-^. The 
diameter of an individual vent shall not be less than 
one and one-fourth (1-1/4) inches (32 mm) nor less 
than one-half (1/2) the diameter of the drain to 
which it is connected. In addition, the drainage 
piping of each building and each connection to a 
public sewer or a private sewage disposal systeni 
shall be vented by means of one or more vent pipes, 
the aggregate cross-sectional area of which shall not 
be less than that of the largest required building 
sewer, as determined from Table 7-5. Vent pipes 
from fixtures located upstream from pumps, ejectors, 
backwater valves, or other devices which in any way 
obstruct the free flow of air and other gases between 
the building sewer and the outside atmosphere shall 
not be used for meeting the cross-sectional area 
venting requirements of this section. 



123 



904.1 -907.1 



UNIFORM PLUMBING CODE 



Exception: When connected to a common 
building sewer, the drainage piping of two (2) or 
more buildings located on the same lot and under 
one (1) ownership may be vented by means of 
piping sized in accordance with Table 7-5, 
provided the aggregate cross-sectional area of all 
vents is not less than that of the largest required 
common building sewer. 

904.2 No more than one-third (1/3) of the total 
permitted length, per Table 7-5, of any minimum 
sized vent shall be installed in a horizontal position. 

Exception: When a minimum sized vent is 
increased one (1) pipe size for its entire length, 
the maximum length limitation does not apply. 

905.0 Vent Pipe Grades and Connections. 

905.1 All vent and branch vent pipes shall be free 
from drops or sags, and each such vent shall be level 
or shall be so graded and coruiected as to drip back 
by gravity to the drainage pipe it serves. 

905.2 Where vents connect to a horizontal drainage 
pipe, each vent pipe shall have its invert taken off 
above the drainage centerline of such pipe 
downstream of the trap being served. 

905.3 Unless prohibited by structural conditions, 
each vent shall rise vertically to a point not less than 
six (6) inches (152 mm) above the flood level rim of 
the fixture served before offsetting horizontally, and 
whenever two or more vent pipes converge, each 
such vent pipe shall rise to a point at least six (6) 
inches (152 mm) in height above the flood level rim 
of the plumbing fixture it serves before being 
connected to any other vent. Vents less than six (6) 
inches (152 mm) above the flood level rim of the 
fixture shall be installed with approved drainage 
fittings, material, and grade to the drain. 

905.4 All vent pipes shall extend undiminished in 
size above the roof, or shall be reconnected with a 
soil or waste vent of proper size. 

905.5 The vent pipe opening from a soil or waste 
pipe, except for water closets and similar fixtures, 
shall not be below the weir of the trap. 

905.6 Two (2) fixtures may be served by a common 
vertical pipe when each such fixture wastes separately 
into an approved double fitting having inlet openings 
at the same level. 

906.0 Vent Termination. 

906.1 Each vent pipe or stack shall extend through 
its flashing and shall terminate vertically not less 
than six (6) inches (152 mm) above the roof nor less 
than one (1) foot (305 mm) from any vertical surface. 



906.2 Each vent shall terminate not less than ten 
(10) feet (3048 mm) from, or at least three (3) feet (914 
mm) above, any openable window, door, opening, 
air intake, or vent shaft, nor less than three (3) feet 
(914 mm) in every direction from any lot line-alley 
and street excepted. 

906.3 Vent pipes shall be extended separately or 
combined, of full required size, not less than six (6) 
inches (152 mm) above the roof or fire wall. 
Flagpoling of vents shall be prohibited except where 
the roof is used for purposes other than weather 
protection. All vents within ten (10) feet (3048 mm) of 
any part of the roof that is used for such other 
purposes shall extend not less than seven (7) feet (2134 
mm) above such roof and shall be securely stayed. 

906.4 Vent pipes for outdoor installations shall 
extend at least ten (10) feet (3048 mm) above the 
surrounding ground and shall be securely supported. 

906.5 Joints at the roof around vent pipes shall be 
made watertight by the use of approved flashings or 
flashing material. 

906.6 Lead. See Table 14-1. Sheet lead shall be not 
less than the following: 

For safe pans - not less than four (4) pounds per 
square foot (19.5 kg/m^) or 1 / 16 inch (1.6 mm) thick. 

For flashings or vent terminals - not less than 
three (3) pounds per square foot (14.7 kg/m^) or 1.2 
mm thick. 

Lead bends and lead traps shall not be less than 
one-eighth (1/8) inch (3.2 mm) wall thickness. 

906.7 Frost or Snow Closure. Where frost or snow 
closure is likely to occur in locations having minimum 
design temperature below 0°F (-17.8°C), vent 
terminals shall be a minimum of two (2) inches (51 
mm) in diameter, but in no event smaller than the 
required vent pipe. The change in diameter shall be 
made inside the building at least one (1) foot (305 mm) 
below the roof in an insulated space and terminate not 
less than ten (10) inches (254 mm) above the roof, or as 
required by the Authority Having Jurisdiction. I 

907.0 Vent Stacks and Relief Vents. 

907.1 Each drainage stack which extends ten (10) or 
more stories above the building drain or other 
horizontal drain, shall be served by a parallel vent 
stack which shall extend undiminished in size from its 
upper terminal and connect to the drainage stack at or 
immediately below the lowest fixture drain. Each such 
vent stack shall also be connected to the drainage 
stack at each fifth floor, counting down from the 
uppermost fixture drain, by means of a yoke vent, the 



124 



VENTS 



907.1 -910.6 



size of which shall be not less in diameter than either 
the drainage or the vent stack, whichever is smaller. 

I 907.2 The yoke vent connection to the vent stack 
shall be placed not less than forty-two (42) inches 
(1067 mm) above the floor level, and the yoke vent 
connection to the drainage stack shall be by means of 
a wye-branch fitting placed below the lowest 
drainage branch connection serving that floor. 

908.0 Vertical Wet Venting. 

908.1 Wet venting is limited to vertical drainage 
piping receiving the discharge from the trap arm of 
one (1) and two (2) fixture unit fixtures that also 
serves as a vent for not to exceed four (4) fixtures. 
All wet-vented fixtures shall be within the same 
story; provided, further, that fixtures with a 
continuous vent discharging into a wet- vent shall be 
within the same story as the wet- vented fixtures. No 
wet vent shall exceed six (6) feet (1829 mrh) in 
developed length. 

908.2 The vertical piping between any two (2) 
consecutive inlet levels shall be considered a wet- 
vented section. Each wet-vented section shall be a 
minimum of one (1) pipe size larger than the 
required minimum waste pipe size of the upper 
fixture or shall be one (1) pipe size larger than the 
required minimum pipe size for the sum of the 
fixture units served by such wet-vented section, 
whichever is larger, but in no case less than two (2) 
inches (51 mm). 

908.3 Common vent sizing shall be the sum of the 
fixture units served but in no case smaller than the 
minimum vent pipe size required for any fixture 
served, or by Section 904.0. 

909.0 Special Venting for Island Fixtures. 

Traps for island sinks and similar equipment shall be 
roughed in above the floor and may be vented by 
extending the vent as high as possible, but not less 
than the drainboaird height and then returning it 
downward and connecting it to the horizontal sink 
drain immediately downstream from the vertical 
fixture drain. The return vent shall be connected to the 
horizontal drain through a wye-branch fitting and 
shall, in addition, be provided with a foot vent taken 
off the vertical fixture vent by means of a wye branch 
immediately below the floor and extending to the 
nearest partition and then through the roof to the 
open air or may be connected to other vents at a point 
not less than six (6) inches (152 mm) above the flood- 
level rim of the fixtures served. Drainage fittings shall 
be used on all parts of the vent below the floor level, 
and a minimum slope of one-quarter (1/4) inch per 



foot (20.9 mm/m) back to the drain shall be 
maintained. The return bend used under the 
drainboard shall be a one (1) piece fitting or an 
assembly of a forty-five (45) degree (0.79 rad), a ninety 
(90) degree (1.6 rad), and a forty-five (45) degree (0.79 
rad) elbow in the order named. Pipe sizing shall be as 
elsewhere required in this code. The island sink drain, 
upstream of the returned vent, shall serve no other 
fixtures. An accessible cleanout shall be installed in 
the vertical portion of the foot vent. 

910.0 Combination Waste and Vent Systems. 

910.1 Combination waste and vent systems shall be 
permitted only where structural conditions preclude 
the installation of conventional systems as otherwise 
prescribed by this code. 

91 0.2 Plans and specifications for each combination 
waste and vent system shall first be approved by the 
Authority Having Jurisdiction before any portion of | 
any such system is installed. 

910.3 Each combination waste and vent system, as 
defined in Chapter 2, shall be provided with a vent 
or vents adequate to ensure free circulation of air. 
Any branch more than fifteen (15) feet (4572 mm) 
in length shall be separately vented in an approved 
manner. The minimum area of any vent installed in 
a combination waste and vent system shall be at 
least one-half (1/2) the inside cross-sectional area 
of the drain pipe served. The vent connection shall 
be downstream of the uppermost fixture. 

910.4 Each waste pipe and each trap in any such 
system shall .be at least two (2) pipe sizes larger than 
the sizes required by Chapter 7 of this code, and at 
least two (2) pipe sizes larger than any fixture 
tailpiece or connection. 

910.5 Unless specifically required or permitted by 
the Authority Having Jurisdiction, no vertical waste | 
pipe shall be used in any such system, except the 
tailpiece or connection between the outlet of a 
plumbing fixture and the trap therefor. Such 
tailpieces or connections shall be as short as possible, 
and in no case shall exceed two (2) feet (610 mm). 

Exception: Branch lines may have forty-five (45) 
degree (0.79 rad) vertical offsets. 

910.6 Cleanouts may not be required on any wet- 
vented branch serving a single trap when the fixture 
tailpiece or connection is not less than two (2) inches 
(50 mm) in diameter and provides ready access for 
cleaning through the trap. An accessible cleanout 
shall be installed in each vent for the combination 
waste and vent system. 



125 



910.7 



UNIFORM PLUMBING CODE 



91 0.7 No water closet or urinal shall be installed on 
any such system. Other one (1), two (2), or three (3) 
unit fixtures remotely located from the sanitary 
system and adjacent to a combination waste and 
vent system may be connected to such system in the 
conventional manner by means of waste and vent 
pipes of regular sizes, providing that the two (2) pipe 
size increase required in Section 910.4 is based on the 
total fixture unit load connected to the system. 

Note: 

See Appendix B of this code for explanatory notes on 
the design of combination waste and vent systems. 



126 



CHAPTER 10 

TRAPS AND INTERCEPTORS 



1001.0 Traps Required. 

1001.1 Each plumbing fixture, excepting those 
having integral traps or as permitted in Section 
1001.2, shall be separately trapped by an approved 
type of waterseal trap. Not more than one (1) trap 
shall be permitted on a trap arm. 

1 001 .2 One (1) trap may serve a set of not more than 
three (3) single compartment sinks or laundry tubs of 
the same depth or three (3) lavatories immediately 
adjacent to each other and in the same room if the 
waste outlets are not more than thirty (30) inches 
(762 mm) apart and the trap is centrally located 
when three (3) compartments are installed. 

1001.3 No food waste disposal unit shall be 
installed with any set of restaurant, commercial, or 
industrial sinks served by a single trap; each such 
food waste disposal unit shall be connected to a 
separate trap. Each domestic clothes washer and 
each laundry tub shall be connected to a separate 
and independent trap, except that a trap serving a 
laundry tub may also receive the waste from a 
clothes washer set adjacent thereto. No clothes 
washer or laundry tub shall be connected to any trap 
for a kitchen sink. 

1 001 .4 The vertical distance between a fixture outlet 
and the trap weir shall be as short as practicable, but 
in no case shall the tailpiece from any fixture exceed 
twenty-four (24) inches (610 mm) in length. 

1002.0 Traps Protected by Vent Pipes. 

1002.1 Each plumbing fixture trap, except as 
otherwise provided in this code, shall be protected 
against siphonage and back-pressure, and air 
circulation shall be assured throughout all parts of 
the drainage system by means of a vent pipe installed 
in accordance with the requirements of this code. 

1002.2 Each fixture trap shall have a protecting vent 
so located that the developed length of the trap arm 
from the trap weir to the inner edge of the vent shall be 
within the distance given in Table 10-1, but in no case 
less than two (2) times the diameter of the trap arm. 

1002.3 A trap arm may change direction without 
the use of a cleanout when such change of direction 
does not exceed ninety (90) degrees (1.6 rad). All 
horizontal changes in direction of trap arms shall 
comply with Section 706.3. 

Exception: For trap arms three (3) inches (80 
mm) in diameter and larger, the change of 
direction shall not exceed one hundred and 



thirty-five (135) degrees (2.36 rad) without the 
use of a cleanout. 

1002.4 The vent pipe opening from a soil or waste 
pipe, except for water closets and similar fixtures, 
shall not be below the weir of the trap. 

TABLE 10-1 

Horizontai Distance of Trap Arms 

(Except for water closets and similar fixtures)* 

Distance Distance 

Trap Arm Trap to Vent Trap Arm Trap to Vent 
Inches Feet Inches mm mm 



1-1/4 


2 • 


6 


32 


762 


1-1/2 


3 


6 


40 


1067 


2 


5 





50 


1524 


3 


6 





80 


1829 



4 & larger 10 100 & larger 3048 

Slope one-fourth (1/4) inch per foot (20.9 mm/m) 

*The developed length between the trap of a water 
closet or similar fixture (measured from the top of the 
closet ring [closet flange] to the inner edge of the vent) 
and its vent shall not exceed six (6) feet (1829 mm). 

1003.0 Traps — Described. 

1003.1 Each trap, except for traps within an 
interceptor or similar device shall be self-cleaning. 
Traps for bathtubs, showers, lavatories, sinks, 
laundry tubs, floor drains, urinals, drinking 
fountains, dental units, and similar fixtures shall be 
of standard design and weight and shall be of ABS, 
cast brass, cast iron, lead, PP, PVC, or other 
approved material. An exposed and readily 
accessible drawn-brass tubing trap, not less than 17 
B&S Gauge (0.045 inch) (1.1 mm), may be used on 
fixtures discharging domestic sewage. 

Exception: Drawn-brass tubing traps shall not 
be used for urinals. Each trap shall have the 
manufacturer's name stamped legibly in the 
metal of the trap, and each tubing trap shall 
have the gauge of the tubing in addition to the 
manufacturer's name. Every trap shall have a 
smooth and uniforni interior waterway. 



127 



1003.2-1009.7 



UNIFORM PLUMBING CODE 



1003.2 No more than one (1) approved slip joint 
fitting may be used on the outlet side of a trap, and 
no tubing trap shall be installed without a listed 
tubing trap adapter. 

1 003.3 The size (nominal diameter) of a trap for a 
given fixture shall be sufficient to drain the fixture 
rapidly, but in no case less than nor more than one 
(1) pipe size larger than given in Table 7-3. The 
trap shall be the same size as the trap arm to which 
it is connected. 



1008.0 Building Traps. 

Building traps shall not be installed except where 
required by the Authority Having Jurisdiction. Each | 
building trap when installed shall be provided with 
a cleanout and with a relieving vent or fresh-air 
intake on the inlet side of the trap which need not be 
larger than one-half the diameter of the drain to 
which it connects. Such relieving vent or fresh-air 
intake shall be carried above grade and terminate in 
a screened outlet located outside the building. 



1004.0 Traps — Prohibited. 

No form of trap which depends for its seal upon the 
action of movable parts shall be used. No trap which 
has concealed interior partitions, except those of 
plastic, glass, or similar corrosion-resisting material, 
shall be used. "S" traps, bell traps, and crown-vented 
traps shall be prohibited. No fixture shall be double 
trapped. Drum and bottle traps may be installed 
only when permitted by the Authority Having 
Jurisdiction for special conditions. No trap shall be 
installed without a vent, except as otherwise 
provided in this code. 

1005.0 Trap Seals. 

Each fixture trap shall have a water seal of not less 
than two (2) inches (51 mm) and not more than four 
(4) inches (102 mm) except where a deeper seal is 
found necessary by the Authority Having 
Jurisdiction for special conditions or for special 
designs relating to handicapped-accessible fixtures. 
Traps shall be set true with respect to their water 
seals and, where necessary, they shall be protected 
from freezing, 

1006.0 Floor Drain Traps. 

Floor drains shall connect into a trap so constructed 
that it can be readily cleaned and of a size to serve 
efficiently the purpose for which it is intended. The 
drain inlet shall be so located that it is at all times in 
full view. When subject to reverse flow of sewage or 
liquid waste, such drains shall be equipped with an 
approved backwater valve. 

1007.0 Trap Seal Protection. 

Floor drain or similar traps directly connected to the 

drainage system and subject to infrequent use shall 
I be protected with a trap seal primer, except where 

not deemed necessary for safety or sanitation by the 
I Authority Having Jurisdiction. Trap seal primers 

shall be accessible for maintenance. 



1009.0 Industrial Interceptors (Clarifiers) and 
Separators. 

1009.1 When Required. Interceptors (clarifiers) 
(including grease, oil, and sand interceptors 
[clarifiers], etc.) shall be provided when, in the 
judgment of the Authority Having Jurisdiction, they | 
are necessary for the proper handling of liquid 
wastes containing grease, flammable wastes, sand, 
solids, acid or alkaline substances, or other 
ingredients harmful to the building drainage system, 
the public or private sewer, or to public or private 
sewage disposal. 

1009.2 Approval. The size, type, and location of 
each interceptor (clarifier) or separator shall be 
approved by the Authority Having Jurisdiction in | 
accordance with its standards. Except where 
otherwise specifically permitted, no wastes other 
than those requiring treatment or separation shall be 
discharged into any interceptor (clarifier). 

1009.3 Design. Interceptors (clarifiers) for sand and 
similar heavy solids shall be so designed and located 
as to be readily accessible for cleaning and shall have 
a water seal of not less than six (6) inches (152 mm.). 

1009.4 Relief Vent. Interceptors (clarifiers) shall be 
so designed that they will not become air bound if 
closed covers are used. Each interceptor (clarifier) 
shall be properly vented. 

1009.5 Location. Each interceptor (clarifier) cover 
shall be readily accessible for servicing and 
maintaining the interceptor (clarifier) in working and 
operating condition. The use of ladders or the 
removal of bulky equipment in order to service 
interceptors (clarifiers) shall constitute a violation of 
accessibility. Location of all interceptors (clarifiers) 
shall be shown on the approved building plan. 

1009.6 Maintenance of Interceptors. Interceptors 
shall be maintained in efficient operating condition 
by periodic removal of accumulated grease, scum, 
oil, or other floating substances and solids deposited 
in the interceptor. 

1009.7 Discharge. The waste pipe from oil and 
sand interceptors shall discharge as approved by the 
Authority Having Jurisdiction. I 



128 



TRAPS AND INTERCEPTORS 



1010.0-1014.8 



1010.0 Slaughterhouses, Packing Establishments, etc. 

Every fish, fowl, and animal slaughterhouse or 
establishment; every fish, fowl, and meat packing or 
curing establishment; every soap factory, tallow- 
rendering, fat-rendering, and hide-curing 
establishment; or any other establishment; from 
which considerable amounts of grease are likely to 
be discharged into any plumbing system, sewer 
system, or private sewage disposal system shall be 
connected to and shall drain or discharge into a 
grease interceptor (clarifier) of an approved design 
for this use. 



1011.0 l\/linimum Requirements for Auto Wash 
Racks. 

Every private or public wash rack and /or floor or slab 
used for cleaning machinery or machine parts shall be 
adequately protected against storm or surface water 
and shall drain or discharge into an interceptor 
(clarifier) of an approved design for this use. 

1012.0 Commercial and Industrial Laundries. 

Laundry equipment in commercial and industrial 
buildings that does not have integral strainers shall 
discharge into an interceptor having a wire basket or 
similar device that is removable for cleaning and that 
will prevent passage into the drainage system of 
solids one-half (1/2) inch (12.7 mm) or larger in 
maximum dimension, such as string, rags, buttons, 
or other solid materials detrimental to the public 
sewerage system. 

1013.0 Bottling Establishments. Bottling plants 
shall discharge their process wastes into an 
interceptor which will provide for the separation of 
broken glass or other solids, before discharging 
liquid w^astes into the drainage system. 

1014.0 Grease Traps and Grease Interceptors. 

1014.1 When, in the judgment of the Authority 
Having Jurisdiction, waste pretreatment is required, 
an approved type of grease trap complying with the 
provisions of this section shall be installed in the 
waste line leading from sinks, drains, and other 
fixtures or equipment in establishments such as 
restaurants, cafes, lunch counters, cafeterias, bars and 
clubs, hotel, hospital, sanitarium, factory or school 
kitchens, or other establishments where grease may 
be introduced into the drainage or sewage system in 
quantities that can effect line stoppage or hinder 
sewage treatment or private sewage disposal. A 
grease trap is not required for individual dwelling 
units or for any private living quarters. 



1 01 4.2 No grease trap shall be installed which has 
an approved rate of flow of more than fifty-five (55) 
gallons per minute (3.5 L/s), nor less than twenty 
(20) gallons per minute (1.3 L/s), except when 
specially approved by the Authority Having 
Jurisdiction. 

1 01 4.3 Each plumbing fixture or piece of equipment 
connected to a grease trap shall be provided with an 
approved type of vented flow control installed in a 
readily accessible and visible location. Flow control 
devices shall be so designed that the flow through 
such device or devices shall at no time be greater 
than the rated capacity of the grease trap. No flow 
control device having adjustable or removable parts 
shall be approved. The vented flow-control device 
shall be located such that no system vent shall be 
between the flow-control and the grease trap inlet. 
The vent or air inlet of the flow-control device shall 
connect with the sanitary drainage vent system as 
elsewhere required by this code or shall terminate 
through the roof of the building and shall not 
terminate to the free atmosphere inside the building. 

Exception: Listed grease traps with approved 
type flow controls or restricting devices may be 
installed in an accessible location in accordance 
with the manufacturer's instructions. 

1014.4 Each grease trap required by this section 
shall have an approved rate of flow which is not less 
than that given in Table 10-2 for the total number of 
connected fixtures. The total capacity in gallons (L) 
of fixtures discharging into any such grease trap 
shall not exceed two and one-half (2-1/2) times the 
certified GPM (L/s) flow rate of the grease trap as 
per Table 10-2. 

Not more than four (4) separate fixtures shall be 
connected to or discharged into any one (1) grease trap. 

For the purpose of this section, the term 
"fixture" shall mean and include each plumbing 
fixture, appliance, apparatus, or other equipment 
required to be connected to or discharged into a 
grease trap by any provision of this section. 

1014.5 Each fixture discharging into a grease trap 
shall be individually trapped and vented in an 
approved manner. 

1 01 4.6 Grease traps shall be maintained in efficient 
operating condition by periodic removal of the 
accumulated grease. No such collected grease shall 
be introduced into any drainage piping or public or 
private sewer. 

1014.7 RESERVED 

1014.8 Grease Interceptors for Commercial 
Kitchens. Required grease interceptors installed 
outdoors shall comply with the provisions of 
Appendix H. 



129 



1015.0-1017.1 



UNIFORM PLUMBING CODE 



1015.0 Food Waste Disposal and Dishwasher 
Prohibited. 

Unless specifically required or permitted by the 
I Authority Having Jurisdiction, no food waste 
disposal unit or dishwasher shall be connected to or 
discharge into any grease trap. 

TABLE 10-2 
Grease Traps 



Total Number 


Required Rate of 


Grease Retention 


of Fixtures 


Flow per Minute, 


Capacity, 


Connected 


Gallons 


Pounds 



1 


20 


40 


2 


25 


50 


3 


35 


70 


4 


50 


100 



TABLE 10-2 



Total Number 
of Fixtures 
Connected 



Required Rate of 

Flow per Minute, 

Liters 



Grease Retention 

Capacity, 

kg 



1 


76 


18 


2 


95 


22 


3 


132 


31 


4 


189 


45 



Grease Traps (IVIetric) 

Note: 

For installations with more than four (4) fixtures, the 
Authority Having Jurisdiction may permit the use of 
larger grease traps designed not to exceed the 
parameters of Section 1014.4, but not to exceed 
seventy-five (75) GPM (284 liters per minute). 



Sand interceptors shall be built of brick or concrete, 
prefabricated coated steel, or other watertight 
material. The interceptor shall have an interior baffle 
for full separation of the interceptor into two (2) 
sections. The outlet pipe shall be the same size as the 
inlet size of the oil interceptor, the minimum being 
three (3) inches (80 mm), and the baffle shall have 
two (2) operungs of the same diameter as the outlet 
pipe and at the same invert as the outlet pipe. These 
openings shall be staggered so that there cannot be a 
straight line flow between any inlet pipe and the 
outlet pipe. The invert of the inlet pipe shall be no 
lower than the invert of the outlet pipe. 

The sand interceptor shall have a minimum 
dimension of two (2) feet square (0.2 m^) for the net 
free opening of the inlet section and a minimuin 
depth under the invert of the outlet pipe of two (2) 
feet (610 mm). 

For each five (5) gallons (18.9 L) per minute flow 
or fraction thereof over twenty (20) gallons (75.7 L) 
per minute, the area of the sand interceptor inlet 
section is to be increased by one (1) square foot (0.09 
m^). The outlet section shall at all times have a 
minimum area of fifty (50) percent of the inlet 
section. 

The outlet section shall be covered by a solid 
removable cover, set flush with the finished floor, 
and the inlet section shall have an open grating set 
flush with the finished floor and suitable for the 
traffic in the area in which it is located. 

1 01 6.3 Separate Use. Sand and similar interceptors 
for every solid shall be so designed and located as to 
be readily accessible for cleaning, shall have a water 
seal of not less than six (6) inches (152 mm), and shall 
be vented. 

1016.4 RESERVED 



1016.0 Sand Interceptors. 

1016.1 Where Required. 

1016.1.1 Whenever the discharge of a fixture or 
drain may contain solids or semi-solids heavier 
than water that would be harmful to a drainage 
system or cause a stoppage within the system, 
the discharge shall be through a sand interceptor. 
Multiple floor drains may discharge into one 
sand interceptor. 

1016.1.2 Sand interceptors are required 
whenever the Authority Having Jurisdiction 
deems it advisable to have a sand interceptor to 
protect the drainage system. 

1016.2 Construction and Size. 



1017.0 Oil and Flammable Liquid Interceptors. 

1017.1 Interceptors Required. All repair garages 
and gasoline stations with grease racks or grease 
pits, and all factories which have oily, flammable, or 
both types of wastes as a result of manufacturing, 
storage, maintenance, repair, or testing processes, 
shall be provided with an oil or flammable liquid 
interceptor which shall be connected to all necessary 
floor drains. The separation or vapor compartment 
shall be independently vented to the outer air. If two 
(2) or more separation or vapor compartments are 
used, each shall be vented to the outer air or may 
connect to a header which is installed at a minimum 
of six (6) inches (152 mm) above the spill line of the 
lowest floor drain and vented independently to the 



130 



TRAPS AND INTERCEPTORS 1017.1 - 1017.2 

outer air. The minimum size of a flammable vapor 
vent shall not be less than two (2) inches (50 mm), 
and when vented through a sidewall, the vent shall 
not be less than ten (10) feet (3048 mm) above the 
adjacent level at an approved location. The 
interceptor shall be vented on the sewer side and 
shall not connect to a flammable vapor vent. All oil 
and flammable interceptors shall be provided with 
gastight cleanout covers which shall be readily 
accessible. The waste line shall not be less than three 
(3) inches (80 mm) in diameter with a full-size 
cleanout to grade. When an interceptor is provided 
with an overflow, it shall be provided with arl 
overflow line (not less than two (2) inches (50 mm) in 
diameter) to an approved waste oil tank having a 
minimum capacity of five hundred fifty (550) gallons 
(2080 L) and meeting the requirements of the 
Authority Having Jurisdiction. The waste oil from 
the separator shall flow by gravity or shall be 
pumped to a higher elevation by an automatic 
pump. Pumps shall be adequately sized and 
accessible. Waste oil tanks shall have a two (2) inch 
(50 mm) minimum pump-out connection at grade 
and a one and one-half (1-1/2) inch (40 mm) 
minimum vent to atmosphere at an approved 
location at least ten (10) feet (3048 mm) above grade. 

1017.2 Design of Interceptors. Each manufactured 
interceptor that is rated shall be stamped or labeled 
by the manufacturer with an indication of its full 
discharge rate in gpm (L/s). The full discharge rate to 
such an interceptor shall be determined at full flow. 
Each interceptor shall be rated equal to or greater 
than the incoming flow and shall be provided with an 
overflow line to an underground tank. 

Interceptors not rated by the manufacturer shall 
have a depth of not less than two (2) feet (610 mm) 
below the invert of the discharge drain. The outlet 
opening shall have not less than an eighteen (18) inch 
(457 mm) water seal and shall have a minimum 
capacity as follows: where not more than three (3) 
motor vehicles are serviced and /or stored, 
interceptors shall have a minimum capacity of six (6) 
cubic feet (0.2 m^), and one (1) cubic foot (0.03 m^) of 
capacity shall be added for each vehicle up to ten 
(10) vehicles. Above ten (10) vehicles, the Authority 
Having Jurisdiction shall determine the size of the 
interceptor required. Where vehicles are serviced 
only and not stored, interceptor capacity shall be 
based on a net capacity of one (1) cubic foot (0.03 m^ 
for each one hundred (100) square feet (9.3 m^) of 
surface to be drained into the interceptor, with a 
minimum of six (6) cubic feet (0.2 m^). 



131 



UNIFORM PLUMBING CODE 



132 



CHAPTER 11 

STORM DRAINAGE 



1101.0 General. 

1101.1 Where Required. All roofs, paved areas, 
yards, courts, and courtyards shall be drained into a 
separate storm sewer system, or into a combined 
sewer system where a separate storm sewer system 
is not available, or to some other place of disposal 

I satisfactory to the Authority Having Jurisdiction. In 
the case of one- and two-family dwellings, storm 
water may be discharged on flat areas such as streets 
or lawns so long as the storm water shall flow away 
from the building and away from adjoining 
property, and shall not create a nuisance. 

1101.2 Storm Water Drainage to Sanitary Sewer 
Prohibited. Storm water shall not be drained into 
sewers intended for sarutary drainage only. 

1101.3 Material Uses. Rainwater piping placed 
within the interior of a building or run within a vent 
or shaft shall be of cast iron, galvanized steel, 
wrought iron, brass, copper, lead. Schedule 40 ABS 
DWV, Schedule 40 PVC DWV, or other approved 
materials, and changes in direction shall conform to 
the requirements of Section 706.0. ABS and PVC 
DWV piping installations shall be installed in 
accordance with IS 5, IS 9, and Chapter 15 "Firestop 
Protection." Except for individual single-family 
dwelling units, materials exposed within ducts or 
plenums shall have a flame-spread index of not more 
than 25 and a smoke-developed index of not more 
than 50, when tested in accordance with the Test for 
Surface-Burning Characteristics of the Building 
Materials (See the Building Code standards based on 
ASTM E-84 and ANSI/UL 723.). 

1101.4 Expansion Joints Required. Expansion 
joints or sleeves shall be provided where warranted 
by temperature variations or physical conditions. 

1101.5 Subsoil Drains. 

1101.5.1 Subsoil drains shall be provided 
around the perimeter of buildings having 
basements, cellars, or crawl spaces or floors 
below grade. Such subsoil drains may be 
positioned inside or outside of the footing, shall 
be of perforated or open-jointed approved drain 
tile or pipe not less than three (3) inches (80 mm) 
in diameter, and shall be laid in gravel, slag, 
crushed rock, approved three-quarter (3/4) inch 
(19.1 mm) crushed recycled glass aggregate, or 
other approved porous material with a 
minimum of four (4) inches (102 mm) 
surrounding the pipe on all sides. Filter media 
shall be provided for exterior subsoil piping. 



1101 .5.2 Subsoil drains shall be piped to a storm 
drain, to an approved water course, to the front 
street curb or gutter, or to an alley or the 
discharge from the subsoil drains shall be 
conveyed to the alley by a concrete gutter. Where 
a continuously flowing spring or groundwater is 
encountered, subsoil drains shall be piped to a 
storm drain or an approved water course. 

1 1 01 .5.3 Where it is not possible to convey the 
drainage by gravity, subsoil drains shall 
discharge to an accessible sump provided with 
an approved automatic electric pump. The sump 
shall be at least fifteen (15) inches (375 mm) in 
diameter, eighteen (18) inches (457 mm) in 
depth, and provided with a fitted cover. The 
sump pump shall have an adequate capacity to 
discharge all water coming into the sump as it 
accumulates to the required discharge point, and 
the capacity of the pump shall not be less than 
fifteen (15) gpm (1.0 L/s). The discharge piping 
from the sump pump shall be a minimum of one 
and one-half (1-1/2) inches (40 mm) in diameter 
and have a union or other approved quick 
disconnect assembly to make the pump 
accessible for servicing. 

1101.5.4 For separate dwellings not serving 
continuously flowing springs or groundwater, 
the sump discharge pipe may discharge onto a 
concrete splash block with a mirumum length of 
twenty-four (24) inches (610 mm). This pipe shall 
be within four (4) inches (102 mm) of the splash 
block and positioned to direct the flow parallel 
to the recessed line of the splash block. 

1101.5.5 Subsoil drains subject to backflow 
when discharging into a storm drain shall be 
provided with a backwater valve in the drain 
line so located as to be accessible for inspection 
and maintenance. 

1 101.5.6 Nothing in Section 1101.5 shall prevent 
drains that serve either subsoil drains or areaways 
of a detached building from discharging to a 
properly graded open area, provided that: 

(1) They do not serve continuously flowing 
springs or groundwater; 

(2) The point of discharge is at least ten (10) feet 
(3048mm) from any property line; and 

(3) It is impracticable to discharge such drains 
to a storm drain, to an approved water 
course, to the front street curb or gutter, or 
to an alley. 



133 



1101.6-1101.12 



UNIFORM PLUMBING CODE 



1101.6 Building Subdrains. Building subdrains 
located below the public sewer level shall discharge 
into a sump or receiving tank, the contents of which 
shall be automatically lifted and discharged into the 
drainage system as required for building sumps. 

1101.7 Areaway Drains. All open subsurface space 
adjacent to a building serving as an entrance to the 
basement or cellar of a building shall be provided 
with a drain or drains. Such areaway drains shall be 
two (2) inches (50 mm) minimum diameter for 
areaways not exceeding one hundred (100) square 
feet (9.3 m^) in area, and shall be discharged in the 
manner provided for subsoil drains not serving 
continuously flowing springs or groundwater (see 
Section 1101.5.2). Areaways in excess of one hundred 
(100) square feet (9.3 m^) shall not drain into subsoil. 
Areaway drains for areaways exceeding one 
hundred (100) square feet (9.3 m^) shall be sized 
according to Table 11-2. 

1101.8 Window Areaway Drains. Window 
areaways not exceeding ten (10) square feet (0.9 m^) 
in area may discharge to the subsoil drains through a 
two (2) inch (50 mm) pipe. However, window 
areaways exceeding ten (10) square feet (0.9 m^) in 
area shall be handled in the manner provided for 
entrance areaways (see Section 1101.7). 

1101.9 Filling Stations and Motor Vehicle 
Washing Establishments. Public filling stations 
and motor vehicle washing establishments shall have 
the paved area sloped toward sumps or gratings 
within the property lines. Curbs not less than six (6) 
inches (152 mm) high shall be placed where required 
to direct water to gratings or sumps. 

1101.10 Paved Areas. Where the occupant creates 
surface water drainage, the sumps, gratings, or floor 
drains shall be piped to a storm drain or an 
approved water course. 

1 1 01 .1 1 Roof Drainage. 

1 1 01 .1 1 .1 Primary Roof Drainage. Roof areas 
of a building shall be drained by roof drains or 
gutters. The location and sizing of drains and 
gutters shall be coordinated with the structural 
design and pitch of the roof. Unless otherwise 

I required by the Authority Having Jurisdiction, 

roof drains, gutters, vertical conductors or 
leaders, and horizontal storm drains for primary 
drainage shall be sized based on a storm of sixty 
(60) minutes duration and 100-year return 
period. 

1101.11.2 Secondary Roof Drainage. 

1101.11.2.1 Where parapet walls or other 
construction extends above the roof and 
creates areas where storm water would 
become trapped if the primary roof drainage 



system failed to provide sufficient drainage, 
an independent secondary roof drainage 
system consisting of scuppers, standpipes, 
or roof drains shall be provided. Secondary 
roof drainage systems shall be sized in 
accordance with Section 1101.11.1 of this 
code. Overflow drains shall be the same size 
as the roof drains with the inlet flow line 
two (2) inches (51 mm) above the low point 
of the roof and shall be installed 
independent from the roof drains. 

1101.11 .2.2 Where secondary roof drainage 
is provided by means of roof drains or 
standpipes, the secondary system shall be 
separate from the primary system and shall 
discharge independently at grade or other 
approved point of discharge. 

11 01 .1 1 .2.3 Where secondary roof drainage 
is provided, the overflow level(s) into the 
secondary system shall be determined by 
the structural design of the roof, including 
roof deflection, at a level not less than two 
(2) inches (51 mm) above the level of the 
primary drain. An allowance shall be made 
to account for the required overflow head of 
water above the secondary inlets. The 
elevation of the secondary inlet plus the 
required overflow head shall not exceed the 
maximum allowable water level on the roof. 

1101.11.2.4 Scuppers shall be sized as 
rectangular weirs, using hydraulic 
principles to determine the required length 
and resulting overflow head. Secondary roof - 
drains and standpipes shall be sized 
according to Table 11-1. Where standpipes 
are used, the head allowance required under 
Section 1101.11.2.3 shall be not less than one 
and one-half (1-1 /2) inches (38 mm). 

1101.11.3 Equivalent Systems. When 
approved by the Authority Having Jurisdiction, | 
the requirements of Sections 1101.11.1 and 
1101.11.2 shall not preclude the installation of an 
engineered roof drainage system that has 
sufficient capacity to prevent water from 
ponding on the roof in excess of that allowed in 
the roof structural design with a rainfall rate of 
at least twice that for a 100-year, 60-minute 
storm and with a blockage in any single point in 
the storm drainage system. 

1101.12 Cleanouts. 

1101.12.1 Cleanouts for building storm 
drains shall comply with the requirements 
of Section 719.0 of this code. 



134 



STORM DRAINAGE 



1101.12-1105.1 



1101.12.2 Rain leaders and conductors 
connected to a building storm sewer shall 
have a cleanout installed at the base of the 
outside leader or outside conductor before it 
connects to the horizontal drain. 

1101.13 All rainwater sumps serving "public 
use" occupancy buildings shall be provided with 
dual pumps arranged to function alternately in 
case of overload or mechanical failure. 

1102.0 Materials. 

1102.1 Conductors. 

1102.1.1 Conductors installed above ground in 
buildings shall be constructed of materials 
specified in Table 14-1. 

1102.1.2 The inside of conductors installed 
above ground level shall be of seamless copper 
water tube. Type K, L, or M; Schedule 40 copper 
pipe or Schedule 40 copper alloy pipe; Type DWV 
copper drainage tube; service weight cast-iron soil 
pipe or hubless cast-iron soil pipe; standard 
weight galvanized steel pipe; or Schedule 40 ABS 
or Schedule 40 PVC plastic pipe. 

1102.2 Leaders. 

1102.2.1 Leaders shall be constructed of 
materials specified in Table 14-1. ~^ 

1102.2.2 Leaders shall be of seamless copper 
water tube. Type K, L, or M; Schedule 40 copper 
pipe; Schedule 40 copper alloy pipe; type DWV 
copper drainage tube; service weight cast-iron 
soil pipe or hubless cast-iron soil pipe; 
aluminum sheet metal, galvanized steel sheet 
metal or copper sheet metal; standard weight 
galvanized steel pipe; Class DL or XL lead pipe; 
or Schedule 40 ABS or Schedule 40 PVC plastic 
pipe. 

1102.3 Underground Building Storm Drains. All 

underground building storm drains shall be 
constructed of materials specified in Table 14-1. 

1102.4 Building Storm Sewers. Building storm 
sewers shall be constructed of materials specified in 
Table 14-1. 

1102.5 Subsoil Drains. 

1102.5.1 Subsoil drains shall be constructed of 
materials specified in Table 14-1. 

1 1 02.5.2 Subsoil drains shall be open-jointed or 
of perforated pipe, vitrified clay, plastic, cast 
iron, or porous concrete. 



1103.0 Traps on Storm Drains and Leaders. 

1103.1 Where Required. Leaders and storm drains, 
when connected to a combined sewer, shall be 
trapped. Floor and area drains connected to a storm 
drain shall be trapped. 

Exception: Traps shall not be required where 
roof drains, rain leaders, and other inlets are at 
locations allowed under Section 906.0, Vent 
Termination. 

1103.2 Where Not Required. No trap shall be 
required for leaders or conductors which are 
connected to a sewer carrying storm water 
exclusively. 

1103.3 Trap Size. Traps, when installed for 
individual conductors, shall be the same size as the 
horizontal drain to which they are connected. 

1103.4 Method of Installation of Combined 
Sewer. Individual storm-water traps shall be 
installed on the storm-water drain branch serving 
each storm-water inlet, or a single trap shall be 
installed in the main storm drain just before its 
connection with the combined building sewer. Such 
traps shall be provided with an accessible cleanout 
on the outlet side of the trap. 

1104.0 Leaders, Conductors, and Connections. 

1104.1 Improper Use. Leaders or conductors shall 
not be used as soil, waste, or vent pipes nor shall 
soil, waste, or vent pipes be used as leaders or 
conductors. 

1104.2 Protection of Leaders. Leaders installed 
along alleyways, driveways, or other locations where 
they may be exposed to damage shall be protected 
by metal guards, recessed into the wall, or 
constructed from ferrous pipe. 

1104.3 Combining Storm with Sanitary Drainage. 

The sanitary and storm drainage system of a 
building shall be entirely separate, except where a 
combined sewer is used, in which case the building 
storm drain shall be connected in the same 
horizontal plane through single wye fittings to the 
combined building sewer at least ten (10) feet (3048 
mm) downstream from any soil stack. 

1105.0 Roof Drains. 

1105.1 Material. 

1105.1.1 Roof drains shall be constructed of 
materials specified in Table 14-1. 

1105.1.2 Roof drains shall be of cast iron, 
copper or copper alloy, lead, or plastic. 



135 



Table 11-1 



UNIFORM PLUMBING CODE 



TABLE 11-1 
Sizing Roof Drains, Leaders, and Vertical Rainwater Piping 



Size of Drain, 




Maximum AllowabDe Horizontal Projected Roof Areas 




Leader or Pipe, 


Flow, 




Square 


Feet at Various Rainfall Rates 




Inches 


gpm 
















1 \nJh 


2inyh 


3 \nJ\n 


4 \nJh 5 inTh 


6inyh 


2 


23 


2176 


1088 


725 


544 435 


363 


3 


67 


6440 


3220 


2147 


1610 1288 


1073 


4 


144 


13,840 


6920 


4613 


3460 2768 


2307 


5 


261 


25,120 


12,560 


8373 


6280 5024 


4187 


6 


424 


40,800 


20,400 


13,600 


10,200 8160 


6800 


8 


913 


88,000 


44,000 


29,333 


22,000 17,600 


14,667 



TABLE 11-1 (Metric) 
Sizing Roof Drains, Leaders, and Vertical Rainwater Piping 



Size of Drain 
Leader or Pipe, Flow, 
mm Us 



Maximum Allowable Horizontal Projected Roof Areas 
Square Meters at Various Rainfall Rates 

25 mm/h 50 mm/h 75 mm/h lOOmm/h 125mm/h 150mm/h 



50 


1.5 


202 


101 


67 


51 


40 


34 


80 


4.2 


600 


300 


200 


150 


120 


100 


100 


9.1 


1286 


643 


429 


321 


257 


214 


125 


16.5 


2334 


1117 


778 


583 


467 


389 


150 


26.8 


3790 


1895 


1263 


948 


758 


632 


200 


57.6 


8175 


4088 


2725 


2044 


1635 


1363 



Notes: 

1. 
2. 



The sizing data for vertical conductors, leaders, and drains are based on the pipes flowing 7/24 full. 

For rainfall rates other than those listed, determine the allowable roof area by dividing the area given in the 

1 inch/hour (25 mm/hour) colunnn by the desired rainfall rate. 

Vertical piping may be round, square, or rectangular. Square pipe shall be sized to enclose its equivalent 

round pipe. Rectangular pipe shall have at least the same cross-sectional area as its equivalent round pipe, 

except that the ratio of its side dimensions shall not exceed 3 to 1 . 



136 



STORM DRAINAGE 



Table 11-2 



TABLE 11-2 
Sizing of Horizontal Rainwater Piping 



Size of 


Flow at Maximum Allowable Horizontal Projected Roof Areas 




Pipe, 


1/8 inyft. Slope, Square 


Feet at Various Rainfall Rates 




Inches 


gpm 












1 inyh 2 inJh 


SinVh 


4in7h 


S'mJh 


Sinyh 


3 


34 3288 1644 


1096 


822 


657 


548 


4 


78 7520 3760 


2506 


1880 


1504 


1253 


5 


139 13,360 6680 


4453 


3340 


2672 


2227 


6 


222 21,400 10,700 


7133 


5350 


4280 


3566 


8 


478 46,000 23,000 


15,330 


1 1 ,500 


9200 


7670 


10 


860 82,800 41 ,400 


27,600 


20,700 


16,580 


13,800 


12 


1384 133,200 66,600 


44,400 


33,300 


26,650 


22,200 


15 


2473 238,000 119,000 


79,333 


59,500 


47,600 


39,650 



Size of Flow at 
Pipe, 1/4 inyft. Slope, 
Inches gpm 



Maximum Allowable Horizontal Projected Roof Areas 
Square Feet at Various Rainfall Rates 



1 inyh 



2inyh 



SinVh 



4inyh 



5 inJh 



Sinyh 



3 


48 


4640 


2320 


1546 


1160 


928 


773 


4 


110 


10,600 


5300 


3533 


2650 


2120 


1766 


5 


196 


18,880 


9440 


6293 


4720 


3776 


3146 


6 


314 


30,200 


15,100 


10,066 


7550 


6040 


5033 


8 


677 


65,200 


32,600 


21,733 


16,300 


13,040 


10,866 


10 


1214 


116,800 


58,400 


38,950 


29,200 


23,350 


19,450 


12 


1953 


188,000 


94,000 


62,600 


47,000 


37,600 


31,350 


15 


3491 


336,000 


168,000 


112,000 


84,000 


67,250 


56,000 


Size of 


Flow at 


Maximum Allowable Horizontal Projected Roof Areas 




Pipe, 


1/2 inyft. Slope, 


Square 


Feet at Various Rainfall Rates 




Inches 


gpm 


















1 in^h 


2inyh 


SinVh 


4inyh 


SinTh 


BinTh 


3 


68 


6576 


3288 


2192 


1644 


1310 


1096 


4 


156 


15,040 


7520 


5010 


3760 


3010 


2500 


5 


278 


26,720 


13,360 


8900 


6680 


5320 


4450 


6 


445 


42,800 


21 ,400 


14,267 


10,700 


8580 


7140 


8 


956 


92,000 


46,000 


30,650 


23,000 


18,400 


15,320 


10 


1721 


165,600 


82,800 


55,200 


41 ,400 


33,150 


27,600 


12 


2768 


266,400 


133,200 


88,800 


66,600 


53,200 


44,400 


15 


4946 


476,000 


238,000 


158,700 


119,000 


95,200 


79,300 



Notes: 

1 . The sizing data for horizontal piping are based on the pipes flowing full. 

2. For rainfall rates other than those listed, determine the allowable roof area by dividing the area given in the 
1 inch/hour (25 mm/hour) column by the desired rainfall rate. 



137 



Table 11 -2 (Metric) 



UNIFORM PLUMBING CODE 



TABLE 11-2 (Metric) 
Sizing of Horizontal Rainwater Piping 



Size of 


Flow at Maximum Allowable Horizontal Projected Roof Areas 




Pipe, 


10 mm/m Slope, 


Square 1 


Meters at Various Rainfall Rates 




mm 


L/s 














25mm/h 


50 mm/h 


75 mm/h 


100 mm/h 


125 mm/h 


150 mm/h 


80 


2.1 305 


153 


102 


76 


61 


51 


100 


4.9 700 


350 


233 


175 


140 


116 


125 


8.8 1241 


621 


414 


310 


248 


207 


150 


14.0 1988 


994 


663 


497 


398 


331 


200 


30.2 4273 


2137 


1424 


1068 


855 


713 


250 


54.3 7692 


3846 


2564 


1923 


1540 


1282 


300 


87.3 12,375 


6187 


4125 


3094 


2476 


2062 


375 


156.0 22,110 


11,055 


7370 


5528 


4422 


3683 



Size of Flow at 

Pipe, 20 mm/m Slope, 
mm Us 



Maximum Allowable Horizontal Projected Roof Areas 
Square Meters at Various Rainfall Rates 







25 mm/h 


50 mm/h 


75 mm/h 


100 mm/h 


125 mm/h 


150 mm/h 


80 


3.0 


431 


216 


144 


108 


86 


72 


100 


6.9 


985 


492 


328 


246 


197 


164 


125 


12.4 


1754 


877 


585 


438 


351 


292 


150 


19.8 


2806 


1403 


935 


701 


561 


468 


200 


42.7 


6057 


3029 


2019 


1514 


1211 


1009 


250 


76.6 


10,851 


5425 


3618 


2713 


2169 


1807 


300 


123.2 


17,465 


8733 


5816 


4366 


3493 


2912 


375 


220.2 


31,214 


15,607 


10,405 


7804 


6248 


5202 


Size of 


Flow at 


Maximum Allowable Horizontal Projected Roof Areas 


Pipe, 


40 mm/m Slope, 


Square Meters at Various Rainfall Rates 




mm 


Us 


















25 mm/h 


50 mm/h 


75 mm/h 


100 mm/h 


125 mm/h 


150 mm/h 


80 


4.3 


611 


305 


204 


153 


122 


102 


100 


9.8 


1400 


700 


465 


350 


280 


232 


125 


17.5 


2482 


1241 


827 


621 


494 


413 


150 


28.1 


3976 


1988 


1325 


994 


797 


663 


200 


60.3 


8547 


4273 


2847 


2137 


1709 


1423 


250 


108.6 


15,390 


7695 


5128 


3846 


3080 


2564 


300 


174.6 


24,749 


12,374 


8250 


6187 


4942 


4125 


375 


312.0 


44,220 


22,110 


14,753 


11,055 


8853 


7367 



Notes: 

1 . The sizing data for horizontal piping are based on the pipes flowing full. 

2. For rainfall rates other than those listed, determine the allowable roof area by dividing the area given in the 
1 inch/hour (25 mm/hour) column by the desired rainfall rate. 



138 



STORM DRAINAGE 



Table 11-3 



TABLE 11-3 
Size of Gutters 



Diameter of Gutter 












in Inches 




Maximum Rainfall 


in Inches per Hour 






1/16inyft. 


Slope 


2 


3 


4 


5 


6 


3 




340 


226 


170 


136 


113 


4 




720 


480 


360 


288 


240 


5 




1250 


834 


625 


500 


416 


6 




1920 


1280 


960 


768 


640 


7 




2760 


1840 


1380 


1100 


918 


8 




3980 


2655 


1990 


1590 


1325 


10 




7200 


4800 


3600 


2880 


2400 


Diameter of Gutter 












in Indies 




Maximum Rainfall 


in Inches per Hour 






1/8 inyft. 


Slope 


2 


3 


4 


5 


6 


3 




480 


320 


240 


192 


160 


4 




1020 


681 


510 


408 


340 


5 




1760 


1172 


880 


704 


587 


6 




2720 


1815 


1360 


1085 


905 


7 




3900 


2600 


1950 


1560 


1300 


8 




5600 


3740 


2800 


2240 


1870 


10 




10,200 


6800 


5100 


4080 


3400 


Diameter of Gutter 












in Inches 




Maximum Rainfall 


in Inches per Hour 






1/4 inyft. 


Slope 


2 


3 


4 


5 


6 


3 




680 


454 


340 


272 


226 


4 




1440 


960 


720 


576 


480 


5 




2500 


1668 


1250 


1000 


834 


6 




3840 


2560 


1920 


1536 


1280 


7 




5520 


3680 


2760 


2205 


1840 


8 




7960 


5310 


3980 


3180 


2655 


10 




14,400 


9600 


7200 


5750 


4800 


Diameter of Gutter 












in Inches 




Maximum Rainfall 


in Inches per Hour 






1/2 inVft. 


Slope 


2 


3 


4 


5 


6 


3 




960 


640 


480 


384 


320 


4 




2040 


1360 


1020 


816 


680 


5 




3540 


2360 


1770 


1415 


1180 


6 




5540 


3695 


2770 


2220 


1850 


7 




7800 


5200 


3900 


3120 


2600 


8 




11,200 


7460 


5600 


4480 


3730 


10 




20,000 


13,330 


10,000 


8000 


6660 



139 



Table 11-3 (Metric) 



UNIFORM PLUMBING CODE 



TABLE 11-3 (Metric) 
Size of Gutters 



Diameter of 












Gutter in mm 




Maximum Rainfall in Millimeters per Hour 




5.2 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


31.6 


21.0 


15.8 


12.6 


10.5 


100 


66.9 


44.6 


33.4 


26.8 


22.3 


125 


116.1 


77.5 


58.1 


46.5 


38.7 


150 


178.4 


119.1 


89.2 


71.4 


59.5 


175 


256.4 


170.9 


128.2 


102.2 


85.3 


200 


369.7 


246.7 


184.9 


147.7 


123.1 


250 


668.9 


445.9 


334.4 


267.6 


223.0 


Diameter of 












Gutter in mm 




Maximum Rainfall in Millimeters per Hour 




10.4 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


44.6 


29.7 


22.3 


17.8 


14.9 


100 


94.8 


63.3 


47.4 


37.9 


31.6 


25 


163.5 


108.9 


81.8 


65.4 


54.5 


150 


252.7 


168.6 


126.3 


100.8 


84.1 


175 


362.3 


241.5 


181.2 


144.9 


120.8 


200 


520.2 


347.5 


260.1 


208.1 


173.7 


250 


947.6 


631.7 


473.8 


379 


315.9 


Diameter of 












Gutter in mm 




Maximum Rainfall in Millimeters per Hour 




20.9 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


63.2 


42.2 


31.6 


25.3 


21.0 


100 


133.8 


89.2 


66.9 


53.5 


44.6 


125 


232.3 


155.0 


116.1 


92.9 


77.5 


150 


356.7 


237.8 


178.4 


142.7 


118.9 


175 


512.8 


341.9 


256.4 


204.9 


170.9 


200 


739.5 


493.3 


369.7 


295.4 


246.7 


250 


133.8 


891.8 


668.9 


534.2 


445.9 


Diameter of 












Gutter in mm 




Maximum Rainfall in Millimeters per Hour 




41 .7 mm/m Slope 


50.8 


76.2 


101.6 


127.0 


152.4 


80 


89.2 


59.5 


44.6 


35.7 


29.7 


100 


189.5 


126.3 


94.8 


75.8 


63.2 


125 


328.9 


219.2 


164.4 


131.5 


109.6 


150 


514.7 


343.3 


257.3 


206.2 


171.9 


175 


724.6 


483.1 


362.3 


289.9 


241.4 


200 


1040.5 


693.0 


520.2 


416.2 


346.5 


250 


1858.0 


1238.4 


929.0 


743.2 


618.7 



140 



STORM DRAINAGE 



11 05.2 -Table 11-4 



1105.2 Dome or Strainer for General Use. All roof 
drains and overflow drains, except those draining to 
hanging gutters, shall be equipped with strainers 
extending not less than four (4) inches (102 mm) 
above the surface of the roof immediately adjacent to 
the drain. Strainers shall have a minimum inlet area 
above the roof level of not less than one and one-half 
(1-1/2) times the area of the conductor or leader to 
which the drain is connected. 

1105.3 Strainers for Flat Decks. Roof drain strainers 
for use on sun decks, parking decks, and similar areas 
which are normally serviced and maintained may be 
of the flat surface type. Such roof drain strainers shall 
be level with the deck and shall have an available inlet 
area of no less than two (2) times the area of the 
conductor or leader to which the drain is connected. 

1105.4 Roof Drain Flashings. Connection between 
the roof and roof drains which pass through the roof 
and into the interior of the building shall be made 
watertight by the use of proper flashing material. 

1 1 05.4.1 Where lead flashing material is used, it 
shall be a minimum of four (4) pounds per 
square foot (19.5 kg/m^). 

1105.4.2 Where copper flashing material is 
used, it shall be a minimum of twelve (12) 
ounces per square foot (3.7 kg/m^). 

1106.0 Size of Leaders, Conductors, and Storm 
Drains. 

1106.1 Vertical Conductors and Leaders. Vertical 
conductors and leaders shall be sized on the basis of 
the maximum projected roof area and Table 11-1. 

1106.2 Size of Horizontal Storm Drains and 
Sewers. The size of building storm drains or 
building storm sewers or any of their horizontal 
branches shall be based upon the maximum projected 
roof or paved area to be handled and Table 11-2. 

1106.3 Size of Roof Gutters. The size of 
semicircular gutters shall be based on the maximum 
projected roof area and Table 11-3. 

1106.4 Side Walls Draining onto a Roof. Where 
vertical walls project above a roof so as to permit 
storm water to drain to the roof area below, the 
adjacent roof area may be computed from Table 11-1 
as follows: 

(1) For one (1) wall - add fifty (50) percent of 
the wall area to the roof area figures. 

(2) For two (2) adjacent walls - add thirty-five 
(35) percent of the total wall areas. 

(3) Two (2) walls opposite of same height - add 
no additional area. 

(4) Two (2) walls opposite of differing heights - 



add fifty (50) percent of wall area above top 
of lower wall. 

(5) Walls on three (3) sides - add fifty (50) 
percent of area of the inner wall below the 
top of the lowest wall, plus allowance for 
the area of wall above top of lowest wall, 
per (2) and (4) above. 

(6) Walls on four (4) sides - no allowance for 
wall areas below top of lowest wall - add 
for areas above the top of the lowest 
wall per (1), (2), (4), and (5) above. 

1107.0 Values for Continuous Flow. 

Where there is a continuous or semi-continuous 
discharge into the building storm drain or building 
storm sewer, as from a pump, ejector, air- 
conditioning plant, or similar device, one (1) gpm 
(3.8 L/min.) of such discharge shall be computed as 
being equivalent to twenty-four (24) square feet (2.2 
m^) of roof area, based upon a rate of rainfall of four 
(4) inches (102 mm) per hour. 

1108.0 Controlled-Flow Roof Drainage. 

1108.1 Application. In lieu of sizing the storm 
drainage system in accordance with Section 1106.0, 
the roof drainage may be sized on the basis of 
controlled flow and storage of the storm water on the 
roof, provided the following conditions are met: 

(1) The water from a 25-year-frequency storm 
shall not be stored on the roof for more than 
twenty-four (24) hours. 

(2) During the storm, the water depth on the 
roof shall not exceed the depths specified in 
Table 11-4. 

TABLE 11-4 
Controlled-Flow Maximum Roof Water Depth 



Roof Rise,* 


Max Water 


Depth at Drain, 


Inches (mm) 


Inches 


(mm) 


Flat (Flat) 


3 


(76) 


2 (51) 


4 


(102) 


4 (102) 


5 


(127) 


6 (152) 


6 


(152) 



*Vertical measurement from the roof surface at the 
drain to the highest point of the roof surface served 
by the drain, ignoring any local depression 
immediately adjacent to the drain. 



141 



1108.1 -1109.2 



UNIFORM PLUMBING CODE 



(3) No less than two (2) drains shall be installed 
in roof areas of ten thousand (10,000) square 
feet (929.0 m^) or less, and no less than one 
(1) additional drain shall be installed for 
each ten thousand (10,000) square feet (929.0 
m^) of roof area over ten thousand (10,000) 
square feet (929.0 m^). 

(4) Each roof drain shall have a pre-calibrated, 
fixed (non-adjustable), and proportional 
weir (notched) in a standing water 
collar inside the strainer. No mechanical 
devices or valves shall be allowed. 

(5) Pipe sizing shall be based on the 
precalibrated rate of flow (gpm) of the pre- 
calibrated weir for the maximum 
allowable water depth, and Tables 11-1 and 
11-2. 

(6) The height of stones or other granular 
material above the waterproofed surface 
shall not be considered in water depth 
measurement, and the roof surface in the 
viciruty of the drain shall not be recessed to 
create a reservoir. 

(7) Roof design, where controlled-flow roof 
drainage is used, shall be such that the 
minimum design roof live load is 
thirty (30) pounds per square foot (146.5 
kg/m^) to provide a safety factor above 
the fifteen (15) pounds per square foot (73.2 
kg/m^) represented by the depth of 
water stored on the roof as indicated in 
Table 11-4. 

(8) Scuppers shall be provided in parapet walls. 
The distance of scupper bottoms above the 
roof level at the drains shall not exceed the 
maximum distances specified in Table 11-5. 

TABLE 11-5 
Distance of Scupper Bottoms Above Roof 





l\/laximum Distance of 




Scupper Bottom 


Roof Rise,* 


Above Roof Level at Drains, 


Indies (mm) 


Inches 


(mm) 


Flat (Flat) 


3 


(76.2) 


2 (51) 


4 


(102.0) 


4 (102) 


5 


(127.0) 


6 (152) 


6 


(152.0) 



*Vertical measurement from the roof surface at the 
drain to the highest point of the roof surface served 
by the drain, ignoring any local depression 
immediately adjacent to the drain. 



(9) Scupper openings shall be a maximum 
of one (1) inch (25.4 mm) high. A sufficient 
number of scuppers shall be provided so 
that the total scupper cross-sectional area is 
at least equal to that required for horizontal 
storm drains in Table 11-2 (column for half 
(1/2) inch (12.7 mm) slope). 

(10) Flashings shall extend above the top of the 
scuppers. 

(11) At any wall or parapet, forty-five (45) 
degree (0.79 rad) cants shall be installed. 

(12) Separate storm and sanitary drainage 
systems shall be provided within the 
building. 

(13) Calculations for the roof drainage system 
shall be submitted along with the plans to 
the Authority Having Jurisdiction for 
approval. 

1108.2 Setback Roofs. Drains on setback roofs 
may be connected to the controlled-flow drainage 
systems provided: 

(1) The setback is designed for storing water, or 

(2) The square footage of the setback drainage 
area is converted as outlined in Section 
1108.0 to gpm, and the storm-water pipe 
sizes in the controlled-flow system are 
based on the sum of the loads. 

(3) The branch from each of the roof drains that 
are not provided with controlled flow shall 
be sized in accordance with Table 11-1. 

1109.0 Testing. 

1109.1 Testing Required. New building storm 
drainage systems and parts of existing systems that 
have been altered, extended, or repaired shall be 
tested as described in Section 1109.2.1 to disclose 
leaks and defects. 

1109.2 Methods of Testing Storm Drainage 
Systems. Except for outside leaders and perforated 
or open-jointed drain tile, the piping of storm drain 
systems shall be tested upon completion of the rough 
piping installation by water or air, and proved tight. 
The Authority Having Jurisdiction may require the 
removal of any cleanout plugs to ascertain whether 
the pressure has reached all parts of the system. 
Either of the following test methods shall be used: 

1109.2.1 Water Test. After piping has been 
installed, the water test shall be applied to the 
drainage system, either to the entire system or to 
sections. If the test is applied to the entire 
system, all openings in the piping shall be 
tightly closed except for the highest opening, 
and the system shall be filled with water to the 



142 



STORM DRAINAGE 1109.2 

point of overflow. If the system is tested in 
sections, each opening shall be tightly plugged 
except for the highest opening of the section 
under test, and each section shall be filled with 
water, but no section shall be tested with less 
than a ten (10) feet (3048 mm) head of water. In 
testing successive sections, at least the upper ten 
(10) feet (3048 mm) of the next preceding section 
shall be tested so that no joint of pipe in the 
building (except the uppermost ten (10) feet 
(3048 mm) of a roof drainage system, which 
shall be filled with water to the flood level of the 
uppermost roof drain) shall have been 
submitted to a test of less than a ten (10) feet 
(3048 mm) head of water. The water shall be 
kept in the system or in the portion under test 
for at least fifteen (15) minutes before inspection 
starts; the system shall then be tight at all points. 

1 109.2.2 Air Test. The air test shall be made by 
attaching an air compressor testing apparatus to 
any suitable opening after closing all other inlets 
and outlets to the system, forcing air into the 
system until there is a uniform gauge pressure of 
five (5) psi (34.5 kPa) or sufficient to balance a 
column of mercury ten (10) inches (254 mn\) in 
height. This pressure shall be held without 
introduction of additional air for a period of at 
least fifteen (15) minutes. Schedule 40 plastic 
DWV systems shall not be tested by the air test 
method. 

1109.2.3 Exceptions. When circumstances 
exist that make air and water tests described in 
Sections 1109.2.1 and 1109.2.2 above impractical, 
and for minor maintenance, repairs and 
installations, the Authority Having Jurisdiction 
may perform the inspection as considered 
advisable by said authority to ensure that the 
work has been in accordance with provisions of 
this code. 



143 



UNIFORM PLUMBING CODE 



144 



CHAPTER 12 

FUEL PIPING 



1201.0 Scope of Gas Piping. 

(A) Coverage of piping systems shall extend 
from the point of delivery to the connections 
with each gas utilization device. For other 
than undiluted liquefied petroleum gas 
systems, the point of delivery shall be 
considered the outlet of the service m.eter 
assembly or the outlet of the service 
regulator or service shutoff valve where no 
meter is provided. For undiluted liquefied 
petroleum gas systems, the point of delivery 
shall be considered the outlet of the final 
pressure regulator, exclusive of the line gas 
regulators, in the system. 

(B) Piping systems requirements shall include 
design, materials, components, fabrications, 
assembly, installation, testing inspection, 
operation, and maintenance. 

(C) This code shall not apply to the following 
(reference standards for some of which 
appear in Appendix L [NFPA 54:1.1.1.2]): 

(1) Portable LP-Gas equipment of all 
types that are not connected to a 
fixed fuel piping system^ 

(2) Installation of farm equipment such 
as brooders, dehydrators, dryers, 
and irrigation equipment 

(3) Raw material (feedstock) applications 
except for piping to special 
atmosphere generators 

(4) Oxygen-fuel gas cutting and 
welding systems 

(5) Industrial gas applications using 
gases such as acetylene and 
acetylenic compounds, hydrogen, 
amnionia, carbon monoxide, oxygen, 
and nitrogen 

(6) Petroleum refineries, pipeline 
compressor or pumping stations, 
loading terminals, compounding 
plants, refinery tank farms, and 
natural gas processing plants 

(7) Large integrated chemical plants or 
portions of such plants where 
flammable or combustible liquids 
or gases are produced by chemical 
reactions or used in chemical 
reactions 

(8) LP-Gas installations at utility gas 
plants 



(9) Liquefied natural gas (LNG) 
installations 

(10) Fuel gas piping in power and 
atomic energy plants 

(11) Proprietary items of equipment, 
apparatus, or instruments such as 
gas-generating sets, compressors, 
and calorimeters 

(12) LP-Gas equipment for vaporization, 
gas mixing, and gas manufacturing 

(13) LP-Gas piping for buildings under 
construction or renovations that are 
not to become part of the 
permanent building pipin system — 
that is, temporary fixed piping for 
building heat 

(14) Installation of LP-Gas systems for 
railroad switch heating 

(15)Installation of LP-Gas and 
compressed natural gas systems on 
vehicles 

(16) Gas piping, meters, gas-pressure 
regulators, and other appurtenances 
used by the serving gas supplier in 
distribution of gas, other than 
undiluted LP-Gas [NFPA 54: 1.1.1.2] 

1202.0 General. 

The regulations of this chapter shall govern the 
installation of all fuel gas piping in or in connection 
with any building or structure or within the property 
lines of any premises up to 5 psi, other than service 
pipe. Fuel oil piping systems shall be installed in 
accordance with NFPA 31. 

Except for: Gas piping, meters, gas-pressure 
regulators, and other appurtenances used by 
the serving gas supplier in distribution of 
gas, other than undiluted LP-Gas [NFPA 54: 
1.1.1.2] 

1203.0 Definitions. 

For the purposes of this code, these definitions shall 
apply to this chapter. Certain terms, phrases, words, 
and their derivatives shall be interpreted as set forth 
in this section, provided, however, that whenever the 
words "gas meters" appear, they shall be construed 
to also mean valves and those devices required for 
the regulation of pressure and the measurement of 



145 



1203.0-1205.3 



UNIFORM PLUMBING CODE 



natural gas being dispensed for any building, 
structure, or premises. 

I 1203.1 Appliance Fuel Connector - An assembly 
of listed semi-rigid or flexible tubing and fittings to 
carry fuel between a fuel-piping outlet and a fuel- 
burning appliance. 

I 1203.2 Fuel Gas - Natural, manufactured, liquefied 
petroleum, or a mixture of these. 

I 1203.3 Gas Piping - Any installation of pipe, 
valves, or fittings that is used to convey fuel gas, 
installed on any premises or in any building, but 
shall not include: 

(1) Any portion of the service piping. 

(2) Any approved piping connection six (6) feet 
(1829 mm) or less in length between an 
existing gas outlet and a gas appliance 
in the same room with the outlet. 

I 1203.4 Gas-Piping System - Any arrangement of 
gas piping supplied by one (1) meter and each 
arrangement of gas piping serving a building, 
structure, or premises, whether individually metered 
or not. 

I 1203.5 Liquefied Petroleum Gas (LPG) Facilities - 

Liquefied petroleum gas (LPG) facilities means 
tanks, containers, container valves, regulating 
equipment, meters, and /or appurtenances for the 
storage and supply of liquefied petroleum gas for 
any building, structure, or premises. 

1203.6 Provision for Location of Point of Delivery - 

The location of the point of delivery shall be 
acceptable to the serving gas supplier. [NFPA 54:5.2] 

1203.7 Quick-Disconnect Device - A hand- 
operated device which provides a n\eans for 
connecting and disconnecting an appliance or an 
appliance connector to a gas supply and which is 
equipped with an automatic means to shut off the 
gas supply when the device is disconnected. 

I 1203.8 Service Piping - The piping and equipment 
between the street gas main and the gas piping 
_ system inlet which is installed by and. is under the 
control and maintenance of the serving gas supplier. 

I 1203.9 Transition Gas Riser - Any listed or 
approved section or sections of pipe and fittings 
used to convey fuel gas and installed in a gas piping 
system for the purpose of providing a transition 
from below ground to above ground. 

1204.0 Inspection. 

1204.1 Upon completion of the installation, 
alteration, or repair of any gas piping, and prior to 

I the use thereof, the Authority Having Jurisdiction 
shall be notified that such gas piping is ready for 
inspection. 



1204.2 All excavations required for the installation 
of underground piping shall be kept open until such 
time as the piping has been inspected and approved. 
If any such piping is covered or concealed before 
such approval, it shall be exposed upon the direction 
of the Authority Having Jurisdiction. I 

1204.3 The Authority Having Jurisdiction shall | 
make the following inspections and either shall 
approve that portion of the work as completed or 
shall notify the permit holder wherein the same fails 
to comply with this code. 

1204.3.1 Rough Piping Inspection. 

This inspection shall be made after all gas piping 
authorized by the permit has been installed and 
before any such piping has been covered or 
concealed or any fixture or appliance has been 
attached thereto. This inspection shall include a 
determination that the gas-piping size, material, 
and installation meet the requirements of this 
code. 

1204.3.2 Final Piping Inspection. 

This inspection shall be made after all piping 
authorized by the permit has been installed and 
after all portions thereof which are to be covered 
or concealed are so concealed and before any 
fixtures, appliance, or shutoff valve has been 
attached thereto. This inspection shall be in 
accordance with Section 1214.1. Test gauges 
used in conducting tests shall comply with 
Section 319.0, Test Gauges. 

1204.4 In cases where the work authorized by the 
permit consists of a minor installation of additional 
piping to piping already connected to a gas meter, 
the foregoing inspections may be waived at the 
discretion of the Authority Having Jurisdiction. In 
this event, the Authority Having Jurisdiction shall 
make such inspection as deemed advisable in order 
to be assured that the work has been performed in 
accordance with the intent of this code. 

1205.0 Certificate of Inspection. 

1 205.1 If, upon final piping inspection, the installation 
is found to comply with the provisions of this code, a 
certificate of inspection may be issued by the 
Authority Having Jurisdiction. | 

1 205.2 A copy of the certificate of such final piping 
inspection shall be issued to the serving gas supplier 
supplying gas to the premises. 

1205.3 It shall be unlawful for any serving gas 
supplier, or person furnishing gas, to turn on or 
cause to be turned on, any fuel gas or any gas meter 
or meters, until such certificate of final inspection, as 
herein provided, has been issued. 



146 



FUEL PIPING 



1206.0-1209.4 



1206.0 Authority to Render Gas Service. 

1206.1 It shall be unlawful for any person, firm, or 
corporation, excepting an authorized agent or 
employee of a person, firm, or corporation engaged 
in the business of furnishing or supplying gas and 
whose service pipes supply or connect with the 
particular premises, to turn on or reconnect gas 
service in or on any premises where and when gas 
service is, at the time, not being rendered. 

1 206.2 It shall be unlawful to turn on or connect gas 
in or on any premises unless all outlets are properly 
and securely connected to gas appliances or capped 
or plugged with screw joint fittings. 

1207.0 Authority to Disconnect. 

I 1207.1 The Authority Having Jurisdiction or the 
serving gas supplier is hereby authorized to 
disconnect any gas piping or appliance or both which 
shall be found not to conform to the requirements of 
this code or which may be found defective and in 
such condition as to endanger life or property. 

1 207.2 Where such discormection has been made, a 
notice shall be attached to such gas piping or 
appliance or both which shall state the same has been 
disconnected, together with the reasons therefor. 

1 207.3 It shall be unlawful to remove or disconnect 
any gas piping or gas appliance without capping or 
plugging with a screw joint fitting the outlet from 
which said pipe or appliance was removed. All 
outlets to which gas appliances are not connected 
shall be left capped gastight on any piping system 
which has been installed, altered, or repaired. 

Exception: When an approved listed quick 
disconnect device is used. 

1 208.0 Temporary Use of Gas. 

Where temporary use of gas is desired and the 
I Authority Having Jurisdiction deems the use 
necessary, a permit may be issued for such use for a 
period of time not to exceed that designated by the 
I Authority Having Jurisdiction, provided that such 
gas-piping system otherwise conforms to the 
requirements of this code regarding material, sizing, 
and safety. 

1209.0 Gas-Piping System Design, IVIateriais, and 
Components. 

1209.1 Piping Plan. 

1209.1.1 Installation of Piping System. Where 
required by the Authority Having Jurisdiction, a 
piping sketch or plan shall be prepared before 
proceeding with the installation. This plan shall 



show the proposed location of piping, the size of 
different branches, the various load demands, 
and the location of the point of delivery. 

1209.1.2 Addition to Existing System. When 
additional gas utilization equipment is being 
connected to a gas-piping system, the existing 
piping shall be checked to determine whether it 
has adequate capacity (see section 1209.4.3). If 
inadequate, the existing system shall be enlarged 
as required, or separate gas piping of adequate 
capacity shall be provided. 

1209.2 Provision for Location of Point of 
Delivery. The location of the point of delivery shall 
be acceptable to the serving gas supplier. 

1209.3 Interconnections Between Gas-Piping 
Systems. 

1209.3.1 Interconnections Supplying 
Separate Users. Where two or more meters, or 
two or more service regulators where meters are 
not provided, are located on the same premises 
and supply separate users, the gas piping 
systems shall not be interconnected on the outlet 
side of the meters or service regulators. 

1209.3.2 Interconnections for Standby Fuels. 

Where a supplementary gas for standby use is 
connected downstream from a meter or a service 
regulator where a meter is not provided, a 
device to prevent backflow shall be installed. A 
three-way valve installed to admit the standby 
supply and at the same time shut off the regular 
supply shall be permitted to be used for this 
purpose. 

1209.4 Sizing of Gas-Piping Systems. 

1209.4.1 General Considerations. Gas-piping 
systems shall be of such size and so installed as to 
provide a supply of gas sufficient to meet the 
maximiim demand without undue loss of pressure 
between the point of delivery and the gas 
utilization equipment. 

1209.4.2 Maximum Gas Demand. The volume 
of gas to be provided (in cubic feet per hour) 
shall be determined directly from the 
manufacturers' input ratings of the gas 
utilization equipment served. Where the input 
rating is not indicated, the gas supplier, 
equipment manufacturer, or a qualified agency 
shall be contacted or the rating from Table 12-1 
shall be used for estimating the volume of gas to 
be supplied. The total connected hourly load 
shall be used as the basis for piping sizing, 
assuming all equipment is operating at full 
capacity simultaneously. 

Exception: Sizing shall be permitted to be 
based upon established load diversity factors. 



147 



Table 12-1 -1209.5 



UNIFORM PLUMBING CODE 



TABLE 12-1 
Approximate Gas Input for Typical Appliances 



Appliance Input Btu/h. (Approx.) 


Space Heating Units 




Warm air furnace 




Single family 


100,000 


Multifamily, per unit 


60,000 


Hydronic boiler 




Single family 


100,000 


Multifamily, per unit 


60,000 


Space-and Water-Heating Units 




Hydronic boiler 




Single family 


120,000 


Multifamily, per unit 


75,000 


Water-Heating Appliances 




Water heater, automatic 




storage 30 to 40 gal tank 


35,000 


Water heater, automatic 




storage 50 gal tank 


50,000 


Water heater, automatic instantaneous 




Capacity at 2 gal /minute 


142,800 


Capacity at 4 gal /minute 


285,000 


Capacity at 6 gal /minute 


428,400 


Water heater, domestic. 




circulating or side-arm 


35,000 


Cooking Appliances 




Range, freestanding. 




domestic 


65,000 


Built-in oven or broiler unit. 




domestic 


25,000 


Built-in top unit. 




domestic 


40,000 


Other Appliances 




Refrigerator 


3,000 


Clothes dryer, type 1 




(domestic) 


35,000 


Gas fireplace direct vent 


40,000 


Gas log 


80,000 


Barbecue 


40,000 


Gaslight 


2,500 



For SI units: 1 Btu per hour = 0.293 W 
NFPA 54: Table 5.4.2.1 



1209.4.3 Sizing Methods. Gas piping shall be 
sized in accordance with one of the following: 

(1) Pipe sizing tables or sizing equations in this 
chapter. 

(2) Other approved engineering methods 
acceptable to the Authority Havirig 
Jurisdiction. 

(3) Sizing tables included in a listed piping 
system manufacturer's installation 
instructions. 

1209.4.4 Allowable Pressure Drop. The design 
pressure loss in any piping system under 
maximum probable flow conditions, from the 
point of delivery to the inlet connection of the 
gas utilization equipment, shall be such that the 
supply pressure at the equipment is greater than 
the minimum pressure required for proper 
equipment operation. 

1209.5 Acceptable Piping Materials and Joining 
Methods. 

1209.5.1 General. 

1209.5.1.1 Materials. Materials used for 
piping systems shall comply with the 
requirements of this chapter or shall be 
acceptable to the Authority Having 
Jurisdiction. 

1209.5.1.2 Used Materials. Pipe, fittings, 
valves, or other materials shall not be used 
again unless they are free of foreign 
materials and have been ascertained to be 
adequate for the service intended. 

1209.5.1.3 Other Materials. Material not 
covered by the standards specifications 
listed herein shall be investigated and tested 
to determine that it is safe and suitable for 
the proposed service and, in addition, shall 
be recommended for that service by the 
manufacturer and shall be acceptable to the 
Authority Having Jurisdiction. 

1209.5.2 Metallic Pipe. 

1 209.5.2.1 Cast-iron pipe shall not be used. 

1209.5.2.2 Steel and wrought-iron pipe 
shall be at least of standard weight 
(Schedule 40) and shall comply with one of 
the following standards: 

(1) ANSI/ASME B36.10, Welded and 
Seamless Wrought-Steel Pipe 

(2) ASTM A 53, Standard Specification 
for Pipe, Steel, Black and Hot- 
Dipped, Zinc-Coated Welded and 
Seamless 

(3) ASTM A 106, Standard Specification 
for Seamless Carbon Steel Pipe for High- 
Temperature Service 



148 



FUEL PIPING 



1209.5 



1209.5.2.3 Copper and brass pipe shall not 
be used if the gas contains more than an 
average of 0.3 grains of hydrogen sulfide per 
100 scf of gas (0.7 mg/100 L). 

Threaded copper, brass, or aluminum 
alloy pipe shall not be used with gases 
corrosive to such material. 

1209.5.2.4 Aluminum alloy pipe shall 
comply with ASTM B 241, Specification for 
Aluminum-Alloy Seamless Pipe and Seamless 
Extruded Tube (except that the use of alloy 
5456 is prohibited) and shall be marked at 
each end of each length indicating 
compliance. Aluminum alloy pipe shall be 
coated to protect against external corrosion 
where it is in contact with masonry, plaster, 
or insulation or is subject to repeated 
wettings by such liquids as water, 
detergents, or sewage. Aluminum alloy 
pipe shall not be used in exterior locations 
or underground. 

1209.5.3 Metallic Tubing. Seamless copper, 
aluminum alloy, or steel tubing shall not be used 
with gases corrosive to such material. 

1209.5.3.1 Steel tubing shall comply with 
ASTM A 539, Standard Specification for 
Electric Resistance-Welded Coiled Steel Tubing 
for Gas and Fuel Oil Lines, or ASTM A 254, 
Standard Specification for Copper Brazed Steel 
Tubing. 

1209.5.3.2 Copper and brass tubing shall 
not be used if the gas contains more than an 
average of 0.3 g of hydrogen sulfide per 100 
scf of gas (0.7 mg/100 L). Copper tubing 
shall comply with standard Type K or L of 
ASTM B 88, Specification for Seamless Copper 
Water Tube, or ASTM B 280, Specification for 
Seamless Copper Tube for Air-Conditioning and 
Refrigeration Field Service. 

1209.5.3.3 Aluminum alloy tubing shall 
comply with ASTM B 210, Specification for 
Aluminum- Alloy Drawn Seamless Tubes, or 
ASTM B 241, Specification for Aluminum Alloy 
Seamless Pipe and Seamless Extruded Tube. 
Aluminum alloy tubing shall be coated to 
protect against external corrosion where it is 
in contact with masonry, plaster, or 
insulation or is subject to repeated wettings 
by liquids such as water, detergent, or 
sewage. Aluminum alloy tubing shall not be 
used in exterior locations or underground. 

1209.5.3.4 Corrugated stainless steel tubing 
shall be tested and listed in compliance with 
the construction, installation, and performance 



requirements of ANSI /IAS LC-1, Standard 
for Fuel Gas Piping Systems Using Corrugated 
Stainless Steel Tubing. 

1209.5.4 Plastic Pipe, Tubing, and Fittings. 

Plastic pipe, tubing, and fittings shall be used 
outside underground only and shall conform 
with ASTM D 2513, Standard Specification for 
Thermoplastic Gas Pressure Pipe, Tubing, and 
Fittings. Pipe to be used shall be marked "gas" 
and "ASTM D 2513." 

Anodeless risers shall comply with the 
following: 

1209.5.4.1 Factory-assembled anodeless 
risers shall be recommended by the 
manufacturer for the gas used and shall be 
leak tested by the manufacturer in 
accordance with written procedures. 

1 209.5.4.2 Service head adapters and field- 
assembled anodeless risers incorporating 
service head adapters shall be 
recommended by the manufacturer for the 
gas used by the manufacturer and shall be 
design-certified to meet the requirements of 
Category I of ASTM D 2513, Standard 
Specification for Thermoplastic Gas Pressure 
Pipe, Tubing, and Fittings, and the code of 
Federal Regulations, Title 49, Part 
192.281(e). The manufacturer shall provide 
the user qualified installation instructions as 
prescribed by the code of Federal 
Regulations, Title 49, Part 192.283(b). 

1 209.5.4.3 The use of plastic pipe, tubing, 
and fittings in undiluted liquefied 
petroleum gas-piping systems shall be in 
accordance with NFPA 58, Liquefied 
Petroleum Gas Code. 

1209.5.5 Workmanship and Defects. Gas pipe 
or tubing and fittings shall be clear and free from 
cutting burrs and defects in structure or 
threading and shall be thoroughly brushed, and 
chip and scale blown. Defects in pipe, tubing, 
and fittings shall not be repaired. Defective 
pipe, tubing, and fittings shall be replaced. 

1209.5.6 Protective Coating. Where in contact 
with material or atmosphere exerting a corrosive 
action, metallic piping and fittings coated with a 
corrosion-resistant material shall be used. 
External or internal coatings or linings used on 
piping or components shall not be considered as 
adding strength. 

1209.5.7 Metallic Pipe Threads. 

(A) Specifications for Pipe Threads. Metallic 
pipe and fitting threads shall be taper pipe 



149 



1209.5 



UNIFORM PLUMBING CODE 



threads and shall comply with 
ANSI/ASME Bl.20.1, Standard for Pipe 
Threads, General Purpose (Inch). 

(B) Damaged Threads. Pipe with threads that 
are stripped, chipped, corroded, or 
otherwise damaged shall not be used. 
Where a weld opens during the operation of 
cutting or threading, that portion of the pipe 
shall not be used. 

(C) Number of Threads. Field threading of 
metallic pipe shall be in accordance with 
Table 12-2. 

(D) Thread Compounds. Thread (joint) 
compounds (pipe dope) shall be resistant to 
the action of liquefied petroleum gas or to 
any other chemical constituents of the gases 
to be conducted through the piping. 

TABLE 12-2 
Specifications for Threading l\/letallic Pipe 





Approximate Length 


Approximate 


Iron Pipe 


of Threaded 


No. of 


Size (in.) 


Portion (in.) 


Threads to Be Cut 


1/2 


3/4 


10 


3/4 


3/4 


10 


1 


7/8 


10 


1-1/4 


1 


11 


1-1/2 


1 


11 


2 


1 


11 


2-1/2 


1-1/2 


12 


3 


1-1/2 


12 


4 


1-5/8 


13 



For SI units, 1 in. = 25.4 mm. 

1209.5.8 l\/letallic Piping Joints and Fittings. 

The type of piping joint used shall be suitable for 
the pressure-temperature conditions and shall 
be selected giving consideration to joint 
tightness and mechanical strength under the 
service conditions. The joint shall be able to 
sustain the maximum end force due to the 
internal pressure and any additional forces due 
to temperature expansion or contraction, 
vibration, fatigue, or to the weight of the pipe 
and its contents. 

1209.5.8.1 Pipe Joints. Pipe joints shall be 
threaded, flanged, brazed, or welded. 
Where nonferrous pipe is brazed, the 



brazing materials shall have a melting point 
in excess of 1000°F (538°C). Brazing alloys 
shall not contain niore than 0.05 percent 
phosphorus. 

1209.5.8.2 Tubing Joints. Tubing joints 
shall either be made with approved gas 
tubing fittings or be brazed with a material 
having a melting point in excess of 1000°F 
(538°C). Brazing alloys shall not contain 
more than 0.05 percent phosphorus. 

1209.5.8.3 Flared Joints. Flared joints 
shall be used only in systems constructed 
from nonferrous pipe and tubing where 
experience or tests have demonstrated that 
the joint is suitable for the conditions and 
where provisions are made in the design to 
prevent separation of the joints. 

1209.5.8.4 l\1etallic Fittings (Including 
Valves, Strainers, Filters). 

(1) Threaded fittings in sizes larger than 4 
in. (100 mm) shall not be used unless 
acceptable to the Authority Having 
Jurisdiction. 

(2) Fittings used with steel or wrought-iron 
pipe shall be steel, brass, bronze, 
malleable iron, or cast iron. 

(3) Fittings used with copper or brass pipe 
shall be copper, brass, or bronze. 

(4) Fittings used with aluminum alloy pipe 
shall be of aluminum alloy. 

(5) Cast-iron Fittings. 

(a) Flanges shall be permitted. 

(b) Bushings shall not be used. 

(c) Fittings shall not be used in 
systems containing flammable 
gas-air mixtures. 

(d) Fittings in sizes 4 in. (100 mm) 
and larger shall not be used 
indoors unless approved by the 
Authority Having Jurisdiction. 

(e) Fittings in sizes 6 in. (150 mm) 
and larger shall not be used 
unless approved by the 
Authority Having Jurisdiction. 

(6) Aluminum Alloy Fittings. Threads shall 
not form the joint seal. 

(7) Zinc-Aluminum Alloy Fittings. Fittings 
shall not be used in systems containing 
flammable gas-air mixtures. 

(8) Special Fittings. Fittings such as 
couplings; proprietary-type joints; 
saddle tees; gland-type compression 



150 



FUEL PIPING 



1209.5-1209.6 



fittings, and flared, flareless, or 
compression-type tubing fittings 
shall be (1) used within the fitting 
manufacturers' pressure-temperature 
recommendations; (2) used within the 
service conditions anticipated with 
respect to vibration,fatigue, thermal 
expansion, or contraction; (3) installed 
or braced to prevent separation of the 
joint by gas pressure or external 
physical damage; and (4) acceptable to 
the Authority Having Jurisdiction. 

1209.5.9 Plastic Piping, Joints, and 
Fittings. 

Plastic pipe, tubing, and fittings shall be 
joined in accordance with the manufacturers' 
instructions. The following shall be 
observed when making such joints: 

(A) The joint shall be designed and installed 
so that the longitudinal pullout 
resistance of the joint will be at least 
equal to the tensile strength of the 
plastic piping material. 

(B) Heat-fusion joints shall be made in 
accordance with qualified procedures 
that have been established and proven by 
test to produce gastight joints at least as 
strong as the pipe or tubing being joined. 
Joints shall be made with the joining 
method recommended by the pipe 
manufacturer. Heat- fusion fittings shall 
be marked "ASTM D 2513." 

(C) Where compression-type mechanical 
joints are used, the gasket material in the 
fitting shall be compatible with the 
plastic piping and with the gas 
distributed by the system. An internal 
tubular rigid stiffener shall be used in 
conjunction with the fitting. The 
stiffener shall be flush with the end of 
the pipe or tubing and shall extend at 
least to the outside end of the pipe or 
tubing and shall extend at least to the 
outside end of the compression fitting 
when installed. The stiffener shall be 
free of rough or sharp edges and shall 
not be a force fit in the plastic. Split 
tubular stiffeners shall not be used. 

(D) Plastic piping joints and fittings for use 
in liquefied petroleum gas-piping 
systems shall be in accordance with 
Liquefied Petroleum Gas Code, NFPA 58. 



1209.5.10 Flanges. All flanges shall comply 
with ANSI/ASME B16.1, Standard for Cast Iron 
Pipe Flanges and Flanged Fittings; ANSI/ASME 
B16.20, Standard for Ring-Joint Gaskets and Grooves 
for Steel Pipe Flanges; or MSS SP-6, Standard 
Finishes for Contact Faces of Pipe Flanges and 
Connecting-End Flanges of Valves and Fittings. The 
pressure-temperature ratings shall equal or 
exceed that required by the application. 

(A) Flange Facings (Standard facings shall be 
permitted for use under this code. Where 
150-psi (1090 kPa) steel flanges are bolted to 
Class 125 cast-iron flanges, the raised face 
on the steel flange shall be removed. 

(B) Lapped Flanges. Lapped flanges shall be 
used only above ground or in exposed 
locations accessible for inspection. 

1209.5.11 Flange Gaskets. The material for 
gaskets shall be capable of withstanding the 
design temperature and pressure of the piping 
system and the chemical constituents of the gas 
being conducted without change to its chemical 
and physical properties. The effects of fire 
exposure to the joint shall be considered in 
choosing the material. 

(1) Acceptable materials include the following: 

(a) Metal or metal-jacketed asbestos 
(plain or corrugated) 

(b) Asbestos 

(c) Aluminum "O" rings and spiral- 

wound metal gaskets 

(2) When a flanged joint is opened, the gasket 
shall be replaced. 

(3) Full-face gaskets shall be used with all 
bronze and cast-iron flanges. 

1209.6 Gas Meters. 

1209.6.1 Capacity. Gas meters shall be selected 
for the maximum expected pressure and 
permissible pressure drop. 

1209.6.2 Location. 

(A) Gas meters shall be located in ventilated 
spaces readily accessible for examination, 
reading, replacement, or necessary 
maintenance. 

(B) Gas meters shall not be placed where they 
will be subjected to damage, such as 
adjacent to a driveway; under a fire escape; 
in public passages, halls, or coal bins; or 
where they will be subject to excessive 
corrosion or vibration. 

(C) Gas meters shall be located at least 3 ft (0.9 m) 
from sources of ignition. 



151 



1209.6-1209.7 



UNIFORM PLUMBING CODE 



(D) Gas meters shall not be located where they 
will be subjected to extreme temperatures or 
sudden extreme changes in temperature. 
Meters shall not be located in areas where 
they are subjected to temperatures beyond 
those recommended by the manufacturer. 

1209.6.3 Supports. Gas meters shall be 
supported or connected to rigid piping so as not 
to exert a strain on the meters. Where flexible 
connectors are used to connect a gas meter to 
downstream piping at mobile homes in mobile 
home parks, the meter shall be supported by a 
post or bracket placed in a firm footing or by 
other means providing equivalent support. 

1209.6.4 Meter Protection. Meters shall be 
protected against overpressure, back pressure, 
and vacuum where such conditions are 
anticipated. 

1209.6.5 Identification. Gas piping at multiple 
meter installations shall be marked by a metal 
tag or other permanent means attached by the 
installing agency, designating the building or 
the part of the building being supplied. 

1209.7 Gas Pressure Regulators. 

1209.7.1 Where Required. A line gas pressure 
regulator or gas equipment pressure regulator, 
as applicable, shall be installed where the gas 
supply pressure is higher than that at which the 
branch supply line or gas utilization equipment 
is designed to operate or varies beyond desigri 
pressure limits. 

1209.7.2 Listing. Line gas pressure regulator 
shall be listed in accordance with ANSI Z21.80. 

1209.7.3 Location. The gas pressure regulator 
shall be accessible for servicing. 

1209.7.4 Regulator Protection. Pressure 
regulators shall be protected against physical 
damage. 

1209.7.5 Venting. 

(A) Line Gas Pressure Regulators. 

(1) An independent vent to the outside of 
the building, sized in accordance with 
the regulator manufacturer's instructions, 
shall be provided where the location of 
a regulator is such that a ruptured 
diaphragm will cause a hazard. Where 
there is more than one regulator at a 
location, each regulator shall have a 
separate vent to the outside, or if 
approved by the Authority Having 
Jurisdiction, the vent lines shall be 
permitted to be manifolded in 
accordance with accepted engineering 



practices to minimize back pressure in 
the event of diaphragm failure. [See 
NFPA 54:5.9.7] for information on 
properly locating the vent.) Materials 
for vent piping shall be in accordance 
with Section 1209.5. 

Exception: A regulator and vent- 
limiting means combination listed 
as complying with ANSI Z21.80, 
Standard for Line Pressure Regulators, 
shall be permitted to be used without 
a vent to the outdoors. 



The following references were extracted from NFPA 54: 

5.9.7 Vents. The discharge stacks, vents or outlet 
parts of all pressure-relieving and pressure-limiting 
devices shall be located so that gas is safely discharged into 
the outside atmosphere. 

Discharge stacks or vents shall be designed to prevent 
the entry of water, insects, or any other foreign material 
that could cause blockage. The discharge stack or vent line 
shall be at least the same size as the outlet of the pressure- 
relieving device. 

(2) The vent shall be designed to prevent 
the entry of water, insects, or other 
foreign materials that could cause 
blockage. 

(3) At locations where regulators might be 
submerged during floods, a special 
antiflood-type breather vent fitting shall 
be installed, or the vent line shall be 
extended above the height of the 
expected flood waters. 

(4) A regulator shall not be vented to the 
gas equipment flue or exhaust system. 

(B) Gas Appliance Pressure Regulators. For 

venting of gas appliance pressure regulators [see 
NFPA 54: 8.1.19]. 

The following references were extracted from NFPA 54: 

8.1.19 Venting of Gas Appliance Pressure Regulators. 
Venting of gas appliance pressure regulators shall comply 
with the following requirements: 

(1) Gas appliance pressure regulators requiring 
access to the atmosphere for successful shall 
he equipped with vent piping leading 
outdoors or, if the regulator vent is an 
integral part of the equipment, into the 
combustion chamber adjacent to a 
continuous pilot, unless constructed or 



152 



FUEL PIPING 



1209.7-1209.11 



equipped with a vent-limiting means to 
limit the escape of gas from the vent opening 
in the event of diaphragm failure. 

(2) Vent-limiting means shall be employed on 
listed gas appliance pressure regulators only. 

(3) In the case of vents leading outdoors, means 
shall be employed to prevent water from 
entering this piping and also to prevent 
blockage of vents by insects and foreign 
matter. 

(4) Under no circumstances shall a regulator be 
vented to the gas utilization equipment flue 
or exhaust system. 

(5) In the case of vents entering the combustion 
chamber, the vent shall be located so the 
escaping gas will be readily ignited by 
the pilot and the heat liberated thereby will 
not adversely affect the normal operation of 
the safety shutoff system. The termi- 
nus of the vent shall be securely held in a 
fixed position relative to the pilot. For 
manufactured gas, the need for a flame 
arrester in the vent piping shall be determined. 

(6) Vent lines from a gas appliance pressure 
regulator and bleed lines from a diaphragm- 
type valve shall not be connected to a 
common manifold terminating in a 
combustion chamber. Vent lines shall not 
terminate in positive-pressure- type 
combustion chambers. 

1209.7.6 Bypass Piping. Valved and regulated 
bypasses shall be permitted to be placed around 
gas line pressure regulators where continuity of 
service is imperative. 

1209.7.7 Identification. Line pressure 
regulators at multiple regulator installations 
shall be marked by a metal tag or other 
permanent means designating the building or 
the part of the building being supplied. 

1209.8 Back Pressure Protection. 

1209.8.1 Where to Install. Protective devices 
shall be installed as close to the utilization 
equipment as practical where the design of 
utilization equipment connected is such that 
air, oxygen, or standby gases could be forced 
into the gas supply system. Gas and air 
combustion mixers incorporating double 
diaphragm "zero" or "atmosphere" governors or 
regulators shall require no further protection 
unless connected directly to compressed air or 
oxygen at pressures of 5 psi (34 kPa) or more. 

1209.8.2 Protective Devices. Protective 
devices shall include but not be limited to the 
following: 



(1) Check valves 

(2) Three-way valves (of the type that 
completely closes one side before starting to 
open the other side) 

(3) Reverse flow indicators controlling positive 
shutoff valves 

(4) Normally closed air-actuated positive 
shutoff pressure regulators 

1209.9 Low-Pressure Protection. 

A protective device shall be installed between the 
meter and the gas utilization equipment if the 
operation of the equipment (i.e., gas compressors) is 
such that it could produce a vacuum or a dangerous 
reduction in gas pressure at the meter. Such devices 
include, but are not limited to, mechanical, 
diaphragm-operated, or electrically operated low- 
pressure shutoff valves. 

1209.10 Shutoff Valves. Shutoff valves shall be 
approved and shall be selected giving consideration 
to pressure drop, service involved, emergency use, 
and reliability of operation. Shutoff valves of size 1 
in. National Pipe Thread and smaller shall be listed. 

1209.11 Expansion and Flexibility. 

1209.11.1 Design. Piping systems shall be 
designed to have sufficient flexibility to prevent 
thermal expansion or contraction from causing 
excessive stresses in the piping material, 
excessive bending or loads at joints, or 
undesirable forces or moments at points of 
connections to equipment and at anchorage or 
guide points. Formal calculations or model tests 
shall be required only where reasonable doubt 
exists as to the adequate flexibility of the system. 

Flexibility shall be provided by the use of 
bends, loops, offsets, or couplings of the slip 
type. Provision shall be made to absorb thermal 
changes by the use of expansion joints of the 
bellows type, or by the use of "ball" or "swivel" 
joints. Expansion joints of the slip type shall not 
be used inside buildings or for thermal 
expansion. Where expansion joints are used, 
anchors or ties of sufficient strength and rigidity 
shall be installed to provide for end forces due to 
fluid pressure and other causes. 

Pipe alignment guides shall be used with 
expansion joints according to the recommended 
practice of the joint manufacturer. 

1209.11.2 Special Local Conditions. Where 
local conditions include earthquake, tornado, 
unstable ground, or flood hazards, special 
consideration shall be given to increased 
strength and flexibility of piping supports and 
connections. 



153 



1210.0-1211.2 



UNIFORM PLUMBING CODE 



^2^0.0 RESERVED 

1211.0 Gas Piping Installation. 

1211.1 Piping Underground. 

1 21 1 .1 .1 Clearances. Underground gas piping 
shall be installed with sufficient clearance from 
any other underground structure to avoid 
contact therewith, to allow maintenance, and to 
protect against damage from proximity to other 
structures. In addition, underground plastic 
piping shall be installed with sufficient clearance 
or shall be insulated from any source of heat so 
as to prevent the heat from impairing the 
serviceability of the pipe. 

1211.1.2 Protection Against Damage. 

(A) Cover Requirements. Underground piping 
systems shall be installed with a minimum 
of 18 in. (460 mm) of cover. Where external 
damage to the pipe is not likely to result, the 
minimum cover shall be 12 in. (300 mm). 
Where a minimum of 12 in. (300 mm) of 
cover cannot be provided, the pipe shall be 
installed in conduit or bridged (shielded). 

(B) Trenches. The trench shall be graded so 
that the pipe has a firm, substantially 
continuous bearing on the bottom of the 
trench. 

(C) Backfilling. Where flooding of the trench is 
done to consolidate the backfill, care shall be 
exercised to see that the pipe is not floated 
from its firm bearing on the trench bottom. 

1211.1.3 Protection Against Corrosion. Gas 

piping in contact with earth or other material 
that could corrode the piping shall be protected 
against corrosion in an approved manner. When 
dissimilar metals are joined underground, an 
insulating coupling or fitting shall be used. 
Piping shall not be laid in contact with cinders. 
Uncoated threaded or socket-welded joints shall 
not be used in piping in contact with soil or 
where internal or external crevice corrosion is 
known to occur. 

1211.1.4 Protection Against Freezing. Where 
the formation of hydrates or ice is known to 
occur, piping shall be protected against freezing. 

1211.1.5 Piping Through Foundation Wall. 

Underground piping, where installed through 
the outer foundation or basement wall of a 
building, shall be encased in a protective pipe. 
The space between the gas piping and the 
building shall be sealed to prevent entry of gas 
or water. 

1211.1.6 Piping Underground Beneath 
Buildings. Where the installation of gas piping 



underground beneath buildings is unavoidable, 
the piping shall be encased in an approved 
conduit designed to withstand the superimposed 
loads. The conduit shall extend into a normally 
usable and accessible portion of the building 
and, at the point where the conduit terminates in 
the building, the space between the conduit and 
the gas piping shall be sealed to prevent the 
possible entrance of any gas leakage. Where the 
end sealing is of a type that will retain the full 
pressure of the pipe, the conduit shall be 
designed for the same pressure as the pipe. The 
conduit shall extend at least 4 in. (100 mm) 
outside the building, be vented above grade to 
the outside, and be installed so as to prevent the 
entrance of water and insects. [NFPA 54: 6.1.6] 

1211.1.7 Plastic Pipe. 

(A) Connection of Plastic Piping. Plastic 
pipe shall be installed outside, underground 
only. 

Exception No. 1: Plastic pipe shall be 
permitted to terminate above ground 
where an anodeless riser is used. 

Exception No. 2: Plastic pipe shall be 
permitted to terminate with a wall head 
adapter above ground in buildings, 
including basements, where the plastic 
pipe is inserted in a piping material 
permitted for use in buildings. 

(B) Connections made outside and underground 
between metallic and plastic piping shall be 
made only with ASTM D 2513, Standard 
Specification for Thermoplastic Gas Pressure 
Pipe, Tubing, and Fittings, Category I transition 
fittings. 

(C) An electrically continuous corrosion- 
resistant tracer wire (minimum AWG 14) or 
tape shall be buried with the plastic 
pipe to facilitate locating. One end shall be 
brought above ground at a building wall or 
riser. 

1211.2 Installation of Piping. 

1211.2.1 Piping installed above ground shall be 
securely supported and located where it will be 
protected from physical damage (also see 
1211.1.4). Where passing through an outside 
wall, the piping shall also be protected against 
corrosion by coating or wrapping with an inert 
material approved for such applications. Where 
piping is encased in a protective pipe sleeve, the 
annular space between the gas piping and the 
sleeve shall be sealed at the wall to prevent the 
entry of water, insects, or rodents. 

1211.2.2 Building Structure. 

(1) The installation of gas piping shall not cause 



154 



FUEL PIPING 



1211.2-1211.3 



structural stresses within building components 
to exceed allowable design limits. 

(2) Approval shall be obtained before any 
beams or joists are cut or notched. Permission 
shall be obtained from the Authority Having 
Jurisdiction. 

1211.2.3 Other than Dry Gas. Drips, sloping, 
protection from freezing, and branch pipe 
connections, as provided for in 1211.1.4, 
1211.6.1, and Section 1211.8, shall be provided 
when other than dry gas is distributed and 
climactic conditions make such provisions 
necessary. 

1211.2.4 Gas Piping to be Sloped. Piping for 
other than dry gas conditions shall be sloped not 
less than 1/4 in. in 15 ft (7 mm in 4.6 m) to 
prevent traps. 

1211.2.4.1 Ceiling Locations. Gas piping 
shall be permitted to be installed in 
accessible spaces between a fixed ceiling and 
a dropped ceiling, whether or not such 
spaces are used as a plenum. Valves shall 
not be located in such spaces. 

Exception: Equipment shutoff valves 
required by this code shall be permitted 
to be installed in accessible spaces 
containing vented gas utilization 
equipment. 

1211.2.5 Prohibited Locations. Gas piping 
inside any building shall not be installed in or 
through a circulating air duct, clothes chute, 
chimney or gas vent, ventilating duct, 
dumbwaiter, or elevator shaft. This provision 
shall not apply to ducts used to provide 
combustion and ventilation air in accordance 
with Section 507.0 or to above-ceiling spaces as 
covered in 1211.2.4.1. 

1211.2.6 Hangers, Supports, and Anchors. 

(A) Piping shall be supported with pipe hooks, 
metal pipe straps, bands, brackets, or 
hangers suitable for the size of piping, be of 
adequate strength and quality, and located 
at intervals so as to prevent or damp out 
excessive vibration. Piping shall be 
anchored to prevent undue strains on 
connected equipment and shall not be 
supported by other piping. Pipe hangers 
and supports shall conform to the 
requirements of ANSI/MSS SP-58, Pipe 
Hangers and Supports - Materials, Design and 
Manufacture. 

(B) Spacings of supports in gas-piping 
installations shall not be greater than shown 
in Table 12-3. Spacing of supports for CSST 
shall be in accordance with the CSST 
manufacturer's instruction. 



(C) Supports, hangers, and anchors shall be 
installed so as not to interfere with the free 
expansion and contraction of the piping 
between anchors. All parts of the supporting 
equipment shall be designed and installed 
so they will not be disengaged by 
movement of the supported piping. 

TABLE 12-3 
Support of Piping 



Steel Pipe, 


Spacing of 


Nominal Size of 


Spacing of 


Nominal Size 


Supports 


Tubing 


Supports 


of Pipe 


(ft.) 


Smooth-wall 


(ft.) 


(in.) 




(In. O.D.) 




1/2 


6 


1/2 


4 


3/4 or 1 


8 


5/8 or 3/4 


6 


1-1/4 or larger 


10 


7/8 or 1 


8 


(horizontal) 




(horizontal) 




1-1/4 or larger 


every floor 


1 or larger 


every floor 


(vertical) 


level 


(vertical) 


level 



For SI units: 1 ft = 0.305 m. 

1211.2.7 Removal of Pipe. Where piping 
containing gas is to be removed, the line shall 
be first disconnected from all sources of gas 
and then thoroughly purged with air, water, 
or inert gas before any cutting or welding is 
done. (See Section 1214.7.) 

1211.3 Concealed Piping in Buildings. 

1211.3.1 General. Gas piping in concealed 
locations shall be installed in accordance with 
this section. 

1211.3.2 Connections. Where gas piping is to 
be concealed, unions, tubing fittings, right and 
left couplings, bushings, swing joints, and 
compression couplings made by combinations of 
fittings shall not be used. Connections shall be of 
the following type: 

(1) Pipe fittings such as elbows, tees, and 
couplings 

(2) Joining tubing by brazing (See 1209.5.8.2.) 

(3) Fittings listed for use in concealed spaces 
that have been demonstrated to sustain, 
without leakage, any forces due to 
temperature expansion or contraction, 
vibration, or fatigue based on their 
geographic location, application, or operation. 

(4) Where necessary to insert fittings in gas pipe 
that has been installed in a concealed 



155 



1211.3-1211.5 



UNIFORM PLUMBING CODE 



location, the pipe shall be reconnected by 
welding, flanges, or the use of a ground joint 
union with the nut center-punched to 
prevent loosening by vibration. 

1211.3.3 Piping in Partitions. Concealed gas 
piping shall not be located in solid partitions. 

1211.3.4 Tubing in Partitions. This provision 
shall not apply to tubing that pierces walls, 
floors, or partitions or to tubing installed 
vertically and horizontally inside hollow walls or 
partitions without protection along its entire 
concealed length where both of the following 
requirements are met: 

(1) A steel striker barrier not less than 0.0508 in. 
(1.3 mm) thick, or equivalent, is installed 
between the tubing and the finished wall 
and extends at least 4 in. (100 mm) 
beyond concealed penetrations of plates, fire 
stops, wall studs, and so on. 

(2) The tubing is installed in single runs and is 
not rigidly secured. 

1211.3.5 Piping in Floors. In industrial 
occupancies, gas piping in solid floors such as 
concrete shall be laid in channels in the floor and 
covered to permit access to the piping with a 
minimum of damage to the building. Where 
piping in floor channels could be exposed to 
excessive moisture or corrosive substances, the 
piping shall be protected in an approved 
manner. 

Exception: In other than industrial occupancies 
and where approved by the Authority Having 
Jurisdiction, gas piping embedded in concrete 
floor slabs constructed with portland cement 
shall be surrounded with a minimum of 1-1/2 
in. (38 mm) of concrete and shall not be in 
physical contact with other metallic structures 
such as reinforcing rods or electrically neutral 
conductors. All piping, fittings, and risers shall 
be protected against corrosion in accordance 
with 1209.5.6. Piping shall not be embedded in 
concrete slabs containing quickset additives or 
cinder aggregate. 

1211.4 Piping in Vertical Chases. (See Section 
1202.0.) Where gas piping exceeding 5 psi (34 kPa) is 
located within vertical chases in accordance with 
5.5.1(2), the requirements of 1211.4.1 through 
1211.4.3 shall apply. 
The following references were extracted from NFPA 54: 

5.5.1 Maximum Design Operating Pressure. The 

maximum design operating pressure for piping 

systems located inside buildings shall not exceed 5 

psi (34 kPa) unless one or more of the following 

conditions are met: 



(1) The piping system is welded. 

(2) The piping is located in a ventilated chase or 
otherwise enclosed for protection against 
accidental gas accumulation. 

(3) The piping is located inside buildings or separate 
areas of buildings used exclusively for one of the 
following: 

(a) Industrial processing or heating 

(b) Research 

(c) Warehousing 

(d) Boiler or mechanical equipment rooms 

(4) The piping is a temporary installation for 
buildings under construction. 

1211.4.1 Pressure Reduction. (See Section 
1202.0) Where pressure reduction is required in 
branch cormections for compliance with NFPA 
54 Section 5.5.1, such reduction shall take place 
either inside the chase or immediately adjacent 
to the outside wall of the chase. Regulator 
venting and downstream overpressure 
protection shall comply with 1209.7.4 and NFPA 
Section 5.9. The regulator shall be accessible for 
service and repair and vented in accordance 
with one of the following: 

(1) Where the fuel gas is lighter than air, 
regulators equipped with a vent-limiting 
means shall be permitted to be vented into 
the chase. Regulators not equipped with a 
vent-limiting means shall be permitted to be 
vented either directly to the outdoors or to a 
point within the top 1 ft (0.3m) of the chase. 

(2) Where the fuel gas is heavier than air, the 
regulator vent shall be vented only directly 
to the outdoors. 

1211.4.2 Construction. Chase construction 
shall comply with local building codes with 
respect to fire resistance and protection of 
horizontal and vertical openings. 

1211.4.3 Ventilation. A chase shall be 
ventilated to the outdoors and only at the top. 
The openings shall have a minimum free area (in 
square inches) equal to the product of one-half 
of the maximum pressure in the piping (in psi) 
times the largest nominal diameter of that piping 
(in inches), or the cross-sectional area of the 
chase, whichever is snialler. Where more than 
one fuel gas piping system is present, the free 
area for each system shall be calculated and the 
largest area used. 

1211.5 Gas Pipe Turns. Changes in direction of gas 
pipe shall be made by the use of fittings, factory 
bends, or field bends. 



156 



FUEL PIPING 



1211.5-1211.7 



1211.5.1 Metallic Pipe. Metallic pipe bends 
shall comply with the following: 

(1) Bends shall be made only with bending 
equipment and procedures intended for that 
purpose. 

(2) All bends shall be smooth and free from 
buckling, cracks, or other evidence of 
mechanical damage. 

(3) The longitudinal weld of the pipe shall be 
near the neutral axis of the bend. 

(4) Pipe shall not be bent through an arc of more 
than 90 degrees. 

(5) The inside radius of a bend shall be not less 
than six times the outside diameter of the 
pipe. 

1211.5.2 Plastic Pipe. Plastic pipe bends shall 
comply with the following: 

(1) The pipe shall not be damaged, and the 
internal diameter of the pipe shall not be 
effectively reduced. 

(2) Joints shall not be located in pipe bends. 

(3) The radius of the inner curve of such bends 
shall not be less than 25 times the inside 
diameter of the pipe. 

(4) Where the piping manufacturer specifies the 
use of special bending equipment or 
procedures, such equipment or procedures 
shall be used. 

1211.5.3 Mitered Bends. 

Mitered bends shall be permitted subject to the 
following limitations: 

(1) Miters shall not be used in systems having a 
design pressure greater than 50 psi (340 
kPa). Deflections caused by misalignments 
up to 3 degrees shall not be considered as 
miters. 

(2) The total deflection angle at each miter shall 
not exceed 90 degrees. 

1211.5.4 Elbows. Factory-made welding 
elbows or transverse segments cut therefrom 
shall have an arc length measured along the 
crotch of at least 1 in. (25 mm) for pipe sizes 2 in. 
and larger. 

1211.6 Drips and Sediment Traps. 

1211.6.1 Provide Drips Where Necessary. For 

other than dry gas conditions, a drip shall be 
provided at any point in the line of pipe where 
condensate could collect. Where required by the 
Authority Having Jurisdiction or the serving gas 
supplier, a drip shall also be provided at the 
outlet of the meter. This drip shall be so installed 
as to constitute a trap wherein an accumulation 



of condensate will shut off the flow of gas before 
it will run back into the meter. 

1211.6.2 Location of Drips. All drips shall be 
installed only in such locations that they will be 
readily accessible to permit cleaning or 
emptying. A drip shall not be located where the 
condensate is likely to freeze. 

1 21 1 .6.3 Sediment Traps. (See Section 1 21 2.7.) 
1211.7 Outlets. 

1211.7.1 Location and Installation. 

(1) The outlet fittings or piping shall be securely 
fastened in place. 

(2) Outlets shall not be located behind doors. 

(3) Outlets shall be located far enough from 
floors, walls, patios, slabs, and ceilings to 
permit the use of wrenches without 
straining, bending, or damaging the piping. 

(4) The unthreaded portion of gas piping 
outlets shall extend not less than 1 in. (25 
mm) through finished ceilings or indoor or 
outdoor walls. 

(5) The unthreaded portion of gas-piping outlets 

shall extend not less than 2 in. (50 mm) 
above the surface of floors or outdoor 
patios or slabs. 

(6) The provisions of Sections 1211.7.1 (4) and (5) 
shall not apply to listed quick-disconnect 
devices of the flush-mounted type or listed 
gas convenience outlets. Such devices shall 
be installed in accordance with the manu- 
facturers' installation instructions. 

1211.7.2 Cap All Outlets. 

(A) Each outlet, including a valve, shall be 
closed gastight with a threaded plug or cap 
immediately after installation and shall be 
left closed until the gas utilization 
equipment is connected thereto. When 
equipment is disconnected from an outlet 
and the outlet is not to be used again 
immediately, it shall be closed gastight. 

Exception No. 1: Laboratory equipment 
installed in accordance with 1212.2(A) 
shall be permitted. 

Exception No. 2: The use of a listed 
quick-disconnect device with integral 
shutoff or listed gas convenience outlet 
shall be permitted. 

(B) Equipment shutoff valves installed in 
fireplaces shall be removed and the piping 
capped gastight where the fireplace is used 
for solid fuel burning. 



157 



1211.8-1211.12 



UNIFORM PLUMBING CODE 



1211.8 Branch Pipe Connection. When a 
branch outlet is placed on a main supply line 
before it is known what size pipe will be 
connected to it, the outlet shall be of the same 
size as the line that supplies it. 

1211.9 IVIanual Gas Shutoff Valves. (Also see 
Section 1212.4.) 

1211.9.1 Valves at Regulators. An accessible 
gas shutoff valve shall be provided upstream of 
each gas pressure regulator. Where two gas 
pressure regulators are installed in series in a 
single gas line, a manual valve shall not be 
required at the second regulator. 

1211.9.2 Valves Controlling Multiple Systems. 

(A) Accessibility of Gas Valves. Main gas 
shutoff valves controlling several gas piping 
systems shall be readily accessible for 
operation and installed so as to be protected 
from physical damage. They shall be 
marked with a metal tag or other permanent 
means attached by the installing agency so 
that the gas piping systems supplied 
through them can be readily identified. 

(B) Shutoff Valves for Multiple House Lines. 

In multiple-tenant buildings supplied 
through a master meter, or through one 
service regulator where a meter is not 
provided, or where meters or service 
regulators are not readily accessible from 
the equipment location, an individual 
shutoff valve for each apartment or tenant 
line shall be provided at a converuent point 
of general accessibility. 

In a common system serving a number 
of individual buildings, shutoff valves shall 
be installed at each building. 

1211.9.3 Emergency Shutoff Valves. An 

exterior shutoff valve to permit turning off the 
gas supply to each building in an emergency 
shall be provided. The emergency shutoff valves 
shall be plainly marked as such and their 
locations posted as required by the Authority 
Having Jurisdiction. 

1211.10 Prohibited Devices. No device shall be 
placed inside the gas piping or fittings that will 
reduce the cross-sectional area or otherwise obstruct 
the free flow of gas, except where proper allowance 
in the piping system design has been made for such 
a device and where approved by the Authority 
Having Jurisdiction. 

1211.11 Systems Containing Gas-Air Mixtures 
Outside the Flammable Range. Where gas-air 
mixing machines are employed to produce mixtures 
above or below the flammable range, they shall be 



provided with stops to prevent adjustment of the 
mixture to within or approaching the flammable range. 

1211.12 Systems Containing Flammable Gas-Air 
Mixtures. 

1211.12.1 Required Components. A central 
premix system with a flammable mixture in the 
blower or compressor shall consist of the 
following components: 

(1) Gas-mixing machine in the form of an 
automatic gas-air proportioning device 
combined with a downstream blower or 
compressor 

(2) Flammable mixture piping, minimum 
Schedule 40 NFS 

(3) Automatic firechecks 

(4) Safety blowouts or backfire preventers for 
systems utilizing flammable mixture lines 
above 2-1/2 in. nominal pipe size or the 
equivalent 

1211.12.2 Optional Components. 

The following components shall also be 
permitted to be utilized in any type of central 
premix system: 

(1) Flowmeters 

(2) Flame arresters 

1211.12.3 Additional Requirements. Gas- 
mixing machines shall have nonsparking 
blowers and shall be so constructed that a 
flashback will not rupture machine casings. 

1211.12.4 Special Requirements for Mixing 
Blowers. A mixing blower system shall be 
limited to applications with minimum practical 
lengths of mixture piping, limited to a maximum 
mixture pressure of 10 in. water column (25 Pa) 
and limited to gases containing no more than 10 
percent hydrogen. 

The blower shall be equipped with a gas- 
control valve at its air entrance so arranged that 
gas is admitted to the airstream, entering the 
blower in proper proportions for correct 
combustion by the type of burners employed, 
the said gas-control valve being of either the 
zero governor or mechanical ratio valve type 
that controls the gas and air adjustment 
simultaneously. No valves or other obstructions 
shall be installed between the blower discharge 
and the burner or burners. 

1211.12.5 Installation of Gas-Mixing 
Machines. 

(A) The machine shall be located in a large, 
well-ventilated area or in a small detached 
building or cutoff room provided with room 



158 



FUEL PIPING 



1211.12-1211.14 



construction and explosion vents in 
accordance with sound engineering 
principles. Such rooms or belowgrade 
installations shall have adequate positive 
ventilation. 

(B) Where gas-mixing machines are installed in 
well-ventilated areas, the type of electrical 
equipment shall be in accordance with 
NFPA 70, National Electrical Code®, for 
general service conditions unless other 
hazards in the area prevail. Where gas- 
mixing machines are installed in small 
detached buildings or cutoff rooms, the 
electrical equipment and wiring shall be 
installed in accordance with NFPA 70, 
National Electrical Code, for hazardous 
locations (Articles 500 and 501, Class I, 
Division 2). 

(C) Air intakes for gas-mixing machines using 
compressors or blowers shall be taken from 
outdoors whenever practical. 

(D) Controls for gas-mixing machines shall 
include interlocks and a safety shutoff valve 
of the manual reset type in the gas supply 
connection to each machine arranged to 
automatically shut off the gas supply in the 
event of high or low gas pressure. Except for 
open burner installations only, the controls 
shall be interlocked so that the blower or 
compressor will stop operating following a 
gas supply failure. Where a system employs 
pressurized air, means shall be provided to 
shut off the gas supply in the event of air 
failure. 

(E) Centrifugal gas-mixing machines in parallel 
shall be reviewed by the user and 
equipment manufacturer before installation, 
and means or plans for minimizing these 
effects of downstream pulsation and 
equipment overload shall be prepared and 
utilized as needed. 

1211.12.6 Use of Automatic Firechecks, 
Safety Blowouts, or Backfire Preventers. 

Automatic firechecks and safety blowouts or 
backfire preventers shall be provided in piping 
systems distributing flammable air-gas mixtures 
from gas-mixing machines to protect the piping 
and the machines in the event of flashback, in 
accordance with the following: 

(A) Approved automatic firechecks shall be 
installed upstream as close as practicable to 
the burer inlets following the firecheck 
manufacturers' instructions. 



(B) A separate manually operated gas valve 
shall be provided at each automatic 
firecheck for shutting off the flow of gas-air 
mixture through the firecheck after a 
flashback has occurred. The valve shall be 
located upstream as close as practical to the 
inlet of the automatic firecheck. 

CAUTION: 

These valves shall not be reopened after a flashback 
has occurred until the firecheck has cooled 
sufficiently to prevent reignition of the flammable 
mixture and has been reset properly. 

(C) A safety blowout or backfiring preventer 
shall be provided in the mixture line near the 
outlet of each gas-mixing machine where the 
size of the piping is larger than 2-1/2 in. 
NFS, or equivalent, to protect the mixing 
equipment in the event of an explosion 
passing through an automatic firecheck. The 
manufacturers' instructions shall be followed 
when installing these devices, particularly 
after a disc has burst. 

The discharge from the safety blowout 
or backfire preventer shall be located or 
shielded so that particles from the ruptured 
disc cannot be directed toward personnel. 
Wherever there are interconnected 
installations of gas-mixing machines with 
safety blowouts or backfire preventers, 
provision shall be miade to keep the miixture 
from other machines from reaching any 
ruptured disc opening. Check valves shall 
not be used for this purpose. 

(D) Large-capacity premix systems provided 
with explosion heads (rupture disc) to 
relieve excessive pressure in pipelines shall 
be located at and vented to a safe outdoor 
location. Provisions shall be provided for 
automatically shutting off the supply of gas- 
air mixture in the event of rupture. 

1211.13 Electrical Bonding and Grounding 

(A) Each aboveground portion of a gas piping 
system that is likely to become energized 
shall be electrically continuous and bonded 
to an effective ground-fault current path. 
Gas piping shall be considered to be bonded 
when it is connected to gas utilization 
equipment that is connected to the 
equipment grounding conductor of the 
circuit supplying that equipment. 

(B) Gas piping shall not be used as a grounding 
conductor or electrode. 

1211.14 Electrical Circuits. Electrical circuits shall 
not utilize gas piping or components as conductors. 



159 



1211.14-1211.16 



UNIFORM PLUMBING CODE 



Exception: Low-voltage (50 V or less) control 
circuits, ignition circuits, and electronic flame 
detection device circuits shall be permitted to 
make use of piping or components as a part of 
an electric circuit. 

1211.15 Electrical Connections. 

(A) All electrical connections between wiring 
and electrically operated control devices in 
a piping system shall conform to the 
requirements of NFPA 70, National 
Electrical Code. (See Section 1211.13.) 

(B) Any essential safety control depending on 
electric current as the operating medium 
shall be of a type that will shut off (fail safe) 
the flow of gas in the event of current 
failure. 

1211.16 Pipe Sizing Methods. 

1211.16.1 Where the pipe size is to be 
determined using any of the miethods in sections 
1211.16.1.1 through 1211.16.1.3, the diameter of 
each pipe segment shall be obtained from the 
pipe-sizing tables in Section 1211.16.2 or from 
the sizing equations in section 1211.16.3. 

1211.16.1.1 Longest Length Method. The 

pipe size of each section of gas piping shall 
be determined using the longest length of 
piping from the point of delivery to the 
most remote outlet and the load of the 
section. 

1211.16.1.2 Branch Length Method. Pipe 
shaU be sized as follows: 

(A) Pipe size of each section of the longest 
pipe run from the point of delivery to the 
most remote outlet shall be determined 
using the longest run of piping and the 
load of the section. 

(B) The pipe size of each section of branch 
piping not previously sized shall be 
determined using the length of piping 
from the point of delivery to the most 
remote outlet in each branch and the 
load of the section. 

1211.16.1.3 Hybrid Pressure. The pipe size 
for each section of higher pressure gas 
piping shall be determined using the longest 
length of piping from the point of delivery 
to the most remote line pressure regulator. 
The pipe size from the line pressure 
regulator to each outlet shall be determined 



using the length of piping from the 
regulator to the most remote outlet served 
by the regulator. 

1211.16.2 Tables for Sizing Gas-Piping 
Systems. Tables 12-7 through 12-23 shall be 
used to size gas piping in conjunction with one 
of the methods described in sections 1211.16.1.1 
through 1211.16.1.3. 

1211.16.3 Sizing Equations. The inside 
diameter of smooth wall pipe or tubing shall be 
determined by the sizing equations 12-1 and 12- 
2 using the equivalent pipe length determined 
by methods 1211.16.1.1 through 1211.16.1.3. 

Equation 12-1 Low-Pressure Gas Formula (Less 
than 1.5 psi [10.3 kPa]); 



D= 



Q 



,0.381 



19.17 



\Cr X L/ 



0.206 



where: 

D = inside diameter of pipe, in. 

Q = input rate appliance(s), cubic feet per hour at 
60°F (16°C) and 30 in. (759 mm) mercury column 

Pi = upstream pressure, psia (P^ + 14.7) 

P2 = downstream pressure, psia (P2 + 14.7) 

L =^ equivalent length of pipe, ft 

AH = pressure drop, in. water column (27.7 in. HjO = 
Ipsi) 

Equation 12-2 High-Pressure Gas Formula (1.5 psi 
[10.3 kPa] and above): 



D= 



Q 



0.381 



[(Pll^PgVY] 
CrxL J 



18.93 pPi^-P2-)>Yl 



0.206 



where: 

D = inside diameter of pipe, in. 

Q = input rate appliance(s), cubic feet per hour at 
60°F (16°C) and 30 in. (759 mm) mercury column 

Pi = upstream pressure, psia (P^ + 14.7) 

P2 = downstream pressure, psia (Pj + 14.7) 

L = equivalent length of pipe, ft. 

AH = pressure drop, in. water column (27.7 in. HjO = 
Ipsi) 



160 



FUEL PIPING 



Table 12-4- 1212.3 



TABLE 12-4 

Cr and Y for Natural Gas and Undiluted Propane 
at Standard Conditions 



Formula Factors Gas 



Cr 



Natural Gas 0.6094 0.9992 

Undiluted Propane 1.2462 0.9910 

For SI units, 1 ft^ = 0.028 m^; 1 f t = 0.305 m; 1 in. 
water column = 0.249 kPa; 1 psi = 6.894 kPa; 1000 
Btu/h = 0.293 kW. 

1212.0 Equipment Connections to Building 
Piping. 

1212.1 Connecting Gas Equipment. Gas utilization 
equipment shall be connected to the building piping 
in compliance with 1212.4 and 1212.5 by one of the 
following: 

(1) Rigid metallic pipe and fittings. 

(2) Semirigid metallic tubing and metallic 
fittings. Aluminum alloy tubing shall not be 
used in exterior locations. 

(3) Listed flexible gas connectors in compliance 
with ANSI Z21.24, Standard for Connectors for 
Gas Appliances. The connector shall be used 
in accordance with the terms of their listing 
that are completely in the same room as the 
equipment. 

(4) CSST where installed in accordance with the 
manufacturer's instructions. 

(5) Listed non-metallic gas hose connectors in 
accordance with 1212.2. 

(6) Gas-fired food service (commercial cooking) 
equipment listed for use with casters or 
otherwise subject to movement for cleaning, 
and other large and heavy gas utilization 
equipment that can be moved, shall be 
connected in accordance with the connector 
manufacturer's installation instructions 
using a listed appliance connector 
complying with ANSI Z21.69, Standard for 
Connectors for Movable Gas Appliances. 

(7) In 1212.1(2), (3), and (5), the connector or 
tubing shall be installed so as to be 
protected against physical and thermal 
damage. Aluminum alloy tubing and 
connectors shall be coated to protect against 
external corrosion where they are in contact 
with masonry, plaster, or insulation or are 
subject to repeated wettings by such liquids 
as water (except rain water), detergents, or 
sewage. 



1212.2 Use of Non-Metallic Gas Hose 
Connectors. Listed non-metallic gas hose 
connectors shall be used in accordance with the 
terms of their listing and as follows: 

(A) Indoor. Indoor gas hose connectors shall be 
used only to connect laboratory, shop, and 
ironing equipment requiring mobility 
during operation. An equipment shutoff 
valve shall be installed where the connector 
is attached to the building piping. The 
connector shall be of minimum length and 
shall not exceed 6 ft (1.8 m). The connector 
shall not be concealed and shall not extend 
from one room to another or pass through 
wall partitions, ceilings, or floors. 

(B) Outdoor. Outdoor gas hose connectors are 
permitted to connect portable outdoor gas- 
fired equipment. An equipment shutoff 
valve or a listed quick-disconnect device or 
a listed gas convenience outlet shall be 
installed where the connector is attached to 
the supply piping and in such a manner to 
prevent the accumulation of water or 
foreign matter. This connection shall be 
made only in the outdoor area where the 
equipment is to be used. 

1212.3 Connection of Portable and Mobile 
Industrial Gas Equipment. 

(A) Where portable industrial gas utilization 
equipment or equipment requiring mobility 
or subject to vibration is connected to the 
building gas piping system by the use of a 
flexible hose, the hose shall be suitable and 
safe for the conditions under which it can be used. 

(B) Where industrial gas utilization equipment 
requiring mobility is connected to the rigid 
piping by the use of swivel joints or 
couplings, the swivel joints or couplings 
shall be suitable for the service required, 
and only the minimum number required 
shall be installed. 

(C) Where industrial gas utilization equipment 
subject to vibration is connected to the 
building piping system by the use of all- 
metal flexible connectors, the connectors 
shall be suitable for the service required. 

(D) Where flexible connections are used, they 
shall be of the minimum practical length 
and shall not extend from one room to 
another or pass through any walls, 
partitions, ceilings, or floors. Flexible 
connections shall not be used in any 
concealed location. They shall be protected 
against physical or thermal damage and 
shall be provided with gas shutoff valves in 
readily accessible locations in rigid piping 
upstream from the flexible cormections. 



161 



1212.4-1214.1 



UNIFORM PLUMBING CODE 



1212.4 Equipment Shutoff Valves and 
Connections. Gas utilization equipment connected 
to a piping systen\ shall have an accessible, approved 
manual shutoff valve with a nondisplaceable valve 
member, or a listed gas convenience outlet, installed 
within 6 ft (1.8 m) of the equipment it serves. Where 
a connector is used, the valve shall be installed 
upstream of the connector. A union or flanged 
connection shall be provided downstream from this 
valve to permit removal of controls. Shutoff valves 
serving decorative gas appliances shall be permitted 
to be installed in fireplaces if listed for such use. 

1212.5 Quicic-Disconnect Devices. Quick- 
disconnect devices used to connect equipment to the 
building piping shall be listed. Where they are 
installed indoors, an approved manual shutoff valve 
with a nondisplaceable valve member shall be 
installed upstream of the quick-disconnect device. 

1212.6 Support of Chimneys. All portions of 
chimneys shall be supported for the design and weight 
of the materials employed. Listed factory-built 
chimneys shall be supported and spaced in accordance 
with their listings and the manufacturers' instructions. 

1212.7 Sediment Trap. Where a sediment trap is 
not incorporated as a part of the gas utilization 
equipment, a sediment trap shall be installed as close 
to the inlet of the equipment as practical at the time 
of equipment installation. The sediment trap shall be 
either a tee fitting with a capped nipple in the 
bottom outlet as illustrated in Figure 12-1 or other 
device recognized as an effective sediment trap. 
Illuminating appliances, ranges, clothes dryers, 
decorative vented appliances for installation in 
vented fireplaces, gas fireplaces, and outdoor grills 
shall not be required to be so equipped. 

1212.8 Installation of Piping. Piping shall be 
installed in a manner not to interfere with inspection, 
maintenance, or servicing of the gas utilization 
equipment. 

CS^^supply,; inlet-, 



A 



To 

equipment 
inlet 






T. 



-*^Tee fitting 



Nipple - 
Cap- 



3 in. (80 mm) 

minimum 

i 



Figure 12-1 Method of Installing a Tee Fitting 
Sediment Trap. 



1213.0 Liquefied Petroleum Gas Facilities and 
Piping. 

Liquefied petroleum gas facilities shall comply with 
NFPA 58, Liquefied Petroleum Gas Code. 

1214.0 Pressure Testing and Inspection. 

1214.1 General. 

1214.1.1 Prior to acceptance and initial 
operation, all piping installations shall be 
inspected and pressure tested to determine that 
the materials, design, fabrication, and 
installation practices comply with the 
requirements of this code. 

1214.1.2 Inspection shall consist of visual 
examination during or after manufacture, 
fabrication, assembly, or pressure tests, as 
appropriate. Supplementary types of 
nondestructive inspection techniques, such as 
magnetic-particle, radiographic, and ultrasonic, 
shall not be required unless specifically listed 
herein or in the engineering design. 

1214.1.3 Where repairs or additions are made 
following the pressure test, the affected piping 
shall be tested. Minor repairs and additions are 
not required to be pressure tested provided that 
the work is inspected and connections are tested 
with a noncorrosive leak-detecting fluid or other 
leak-detecting methods approved by the 
Authority Having Jurisdiction. 

1214.1.4 Where new branches are installed from 
the point of delivery to new appliances, only the 
newly installed branches shall be required to be 
pressure tested. Connections between the new 
piping and the existing piping shall be tested 
with a noncorrosive leak-detecting fluid or 
approved leak- detecting methods. 

1214.1.5 A piping system shall be tested as a 
complete unit or in sections. Under no 
circumstances shall a valve in a line be used as a 
bulkhead between gas in one section of the 
piping system and test medium in an adjacent 
section, unless two valves are installed in series 
with a valved "telltale" located between these 
valves. A valve shall not be subjected to the test 
pressure unless it can be determined that the 
valve, including the valve-closing mechanism, is 
designed to safely withstand the pressure. 

1 21 4.1 .6 Regulator and valve assemblies fabricated 
independently of the piping systeni in which they 
are to be installed shall be permitted to be tested 
with inert gas or air at the time of fabrication. 

1214.1.7 Test Medium. The test medium shall 
be air, nitrogen, carbon dioxide, or an inert gas. 
OXYGEN SHALL NEVER BE USED. 



162 



FUEL PIPING 



1214.2-1214.7 



1214.2 RESERVED 

1214.3 Test Preparation. 

1214.3.1 Pipe joints, including welds, shall be 
left exposed for examination during the test. 

Exception: Covered or concealed pipe end 
joints that have been previously tested in 
accordance with this code. 

1214.3.2 Expansion joints shall be provided 
with temporary restraints, if required for the 
additional thrust load under test. 

1214.3.3 Appliances and equipment that are 
not to be included in the test shall be either 
disconnected from the piping or isolated by 
blanks, blind flanges, or caps. Flanged joints at 
which blinds are inserted to blank off other 
equipment during the test shall not be required 
to be tested. 

1 21 4.3.4 Where the piping system is connected 
to appliances, equipment, or equipment 
components designed for operating pressures of 
less than the test pressure, such appliances, 
equipment, or equipment components shall be 
isolated from the piping system by 
disconnecting them and capping the outlets. 

1214.3.5 Where the piping system is connected 
to appliances, equipment, or equipment 
components designed for operating pressures 
equal to or greater than the test pressure, such 
appliances and equipment shall be isolated from 
the piping system by closing the individual 
equipment shutoff valves. 

1214.3.6 All testing of piping systems shall be 
done with due regard for the safety of 
employees and the public during the test. 
Bulkheads, anchorage, and bracing suitably 
designed to resist test pressures shall be installed 
if necessary. Prior to testing, the interior of the 
pipe shall be cleared of all foreign material. 

1214.4 Test Pressure. 

1214.4.1 Test pressure shall be measured with a 
manometer or with a pressure-measuring device 
designed and calibrated to read, record, or 
indicate a pressure loss due to leakage during 
the pressure test period. The source of pressure 
shall be isolated before the pressure tests are 
made. Mechanical gauges used to measure test 
pressures shall have a range such that the 
highest end of the scale is not greater than five 
times the test pressure. 

1 21 4.4.2 The test pressure to be used shall be no 
less than 1-1/2 times the proposed maximum 
working pressure, but not less than 3 psi (20 
kPa), irrespective of design pressure. 

1214.4.3 Test duration shall be not less than 1/2 



h for each 500 cu. ft. (14 m^) of pipe volume or 
fraction thereof. When testing a system having a 
volume less than 10 cu.ft.(0.28 m^) or a system in 
a single-family dwelling, the test duration shall 
be a minimum of 10 minutes. The duration of 
the test shall be a minimum of 10 minutes. The 
duration of the test shall not be required to 
exceed 24 hours. 

1214.5 Detection of Lealcs and Defects. 

1214.5.1 The piping system shall withstand the 
test pressure specified without showing any 
evidence of leakage or other defects. Any 
reduction of test pressures as indicated by 
pressure gauges shall be deemed to indicate the 
presence of a leak unless such reduction can be 
readily attributed to some other cause. 

1 21 4.5.2 The leakage shall be located by means 
of an approved gas detector, a noncorrosive leak 
detection fluid, or other approved leak detection 
methods. Matches, candles, open flames, or 
other methods that provide a source of ignition 
shall not be used. 

1214.5.3 Where leakage or other defects are 
located, the affected portion of the piping system 
shall be repaired or replaced and retested. [See 
Section 1214.1.3.] 

1214.6 System and Equipment Leakage Test. 

1214.6.1 Test Gases. Leak checks using fuel 
gas shall be permitted in piping systems that 
have been pressure tested in accordance with 
Section 1214.0. 

1214.6.2 Before Turning Gas On. Before gas is 
introduced into a system of new gas piping, the 
entire system shall be inspected to determine that 
there are no open fittings or ends and all valves at 
unused outlets are closed and plugged or capped. 

1214.6.3 Test for Leakage. Immediately after 
the gas is turned on into a new system or into a 
system that has been initially restored after an 
interruption of service, the piping system shall 
be tested for leakage. Where leakage is 
indicated, the gas supply shall be shut off until 
the necessary repairs have been made. 

1214.6.4 Placing Equipment in Operation. 

Gas utilization equipment shall not be placed in 
operation until after the piping system has been 
tested in accordance with 1214.6.3 and purged in 
accordance with 1214.7.2. 

1214.7 Purging. 

1214.7.1 Removal From Service. When gas 
piping is to be opened for servicing, addition, or 
modification, the section to be worked on shall 
be turned off from the gas supply at the nearest 
convenient point and the line pressure vented to 



163 



1214.7-1216.1 



UNIFORM PLUMBING CODE 



the outdoors or to ventilated areas of sufficient 
size to prevent accumulation of flammable 
mixtures. The remaining gas in this section of 
pipe shall be displaced with an inert gas as 
required by Table 12-5. 



TABLE 12-5 

Length of Piping Requiring Purging witli Inert 
Gas for Servicing or l\/lodification 



Nominal Pipe 
Size (in.) 



Length of Piping 
Requiring Purging (ft.) 



2 
3 
4 
6 
8 or larger 



>50 
>30 
>15 
>10 
Any length 



For SI units: 1 ft = 0.305 m. 

1214.7.2 Placing in Operation. When piping 
full of air is placed in operation, the air in the 
piping shall be displaced with fuel gas, except 
where such piping is required by Table 12-6 to 
be purged with an inert gas prior to 
introduction of fuel gas. The air can be safely 
displaced with fuel gas provided that a 
moderately rapid and continuous flow of fuel 
gas is introduced at one end of the line and air 
is vented out at the other end. The fuel gas flow 
shall be continued without interruption until 
the vented gas is free of air. The point of 
discharge shall not be left unattended during 
purging. After purging, the vent shall then be 
closed. Where required by Table 12-6, the air in 
the piping shall first be displaced with an inert 
gas, and the inert gas shall then be displaced 
with fuel gas. 



TABLE 12-6 

Length of Piping Requiring Purging with Inert 
Gas Before Placing in Operation 



Nominal Pipe 
Size (in.) 



Length of Piping Requiring 
Purging (ft.) 



8 or larger 



>30 

>15 

>10 

Any length 



For SI units: 1 ft = 0.305 m. 



1214.7.3 Discharge of Purged Gases. The 

open end of piping systems being purged shall 
not discharge into confined spaces or areas 
where there are sources of ignition unless 
precautions are taken to perform this operation 
in a safe manner by ventilation of the space, 
control of purging rate, and elimination of all 
hazardous conditions. 

1214.7.4 Placing Equipment in Operation. 

After the piping has been placed in operation, all 
equipment shall be purged and then placed in 
operation, as necessary. 

1215.0 Interconnections Between Gas Piping 
Systems [NFPA 54: 5.3] 

1215.1 Interconnections Supplying Separate 
Users. Where two or more meters, or two or more 
service regulators where meters are not provided, are 
located on the same premises and supply separate 
users, the gas-piping systems shall not be 
interconnected on the outlet side of the meters or 
service regulators. 

1215.2 Interconnections for Standby Fuels. 

Where supplementary gas for standby use is 
connected downstream from a meter or a 
service regulator where a meter is not 
provided, a device to prevent backflow shall be 
installed. A three-way valve installed to admit 
the standby supply and at the same time shut 
off the regular supply shall be permitted to be 
used for this purpose. 

1216.0 Required Gas Supply. 

1216.1 The following regulations, as set forth in 
this section and in Section 1217.0, Required Gas 
Piping Size, shall be the standard for the 
installation of gas piping. All natural gas 
regulations and tables are based on the use of gas 
having a specific gravity of sixty hundredths 
(0.60), supplied at six (6) to eight (8) inches 
(152-203 mm) water column pressure at the outlet 
of the meter. For undiluted liquefied petroleum 
gas, gas piping may be sized for 2500 Btu per cubic 
foot (25.9 Watt-hours/L) at eleven (11) inches (279 
mm) water column and specific gravity of one and 
fifty-two hundredths (1.52). 

Note: 

Where gas of a different specific gravity is to be 
delivered, the serving gas supplier should be 
contacted for specific gravity conversion factors to 
use in sizing piping systems from the pipe sizing 
tables in this chapter. 



164 



FUEL PIPING 



1216.2-1217.4 



1216.2 The hourly volume of gas required at each 
piping outlet shall be taken as not less than the 
maximum hourly rating as specified by the 
manufacturer of the appliance or appliances to be 
connected to each such outlet. 

1216.3 Where the gas appliances to be installed 
have not been definitely specified. Table 12-1 may be 
used as a reference to estimate requirements of 
typical appliances. 

To obtain the cubic feet per hour (L/sec.) of gas 
required, divide input of appliances by the average 
Btu (Watt-hour) heating value per cubic foot (L) of 
the gas. The average Btu (Watt-hour) per cubic foot 
(L) of the gas in the area of the installation may be 
obtained from the serving gas supplier. 

1 21 6.4 The size of the supply piping outlet for any 
gas appliance shall not be less than one-half (1/2) 
inch (15 mm). 

The minimum size of any piping outlet for a 
mobile home shall be three-quarter (3/4) inch (20 mm). 

1217.0 Required Gas Piping Size. 

1217.1 Where the maximum demand does not 
exceed two hundred fifty (250) cubic feet per hour 
(2 L/sec.) and the maximum length of piping 
between the meter and the most distant outlet is 
not over two hundred fifty (250) feet (76,200 mm), 
the size of each section and each outlet of any 
system of gas piping shall be determined by 
means of Table 12-7 for steel pipe, or Table 12-15 
for copper tubing systems, or Table 12-19 for 
CSST systems. Other systems within the range of 
Table 12-7 or 12-15 or Table 12-19 may be sized 
from that table or by means of the methods set 
forth in Section 1217.3. 

1 21 7.2 To determine the size of each section of pipe 
in any system within the range of Table 12-7, 
proceed as follows: 

(1) Measure the length of the pipe from the gas 
meter location to the most remote outlet on 
the system. 

(2) In Table 12-7 select the length in feet column 
and row showing that distance, or the next 
longer distance if the table does not give the 
exact length. 

(3) Starting at the most remote outlet, find in 
the row just selected the gas demand for 
that outlet. If the exact figure of demand is 
not shown, choose the next larger fig- 
ure in the row. 



(4) At the top of this column will be found the 
correct size of pipe. 

(5) Using this same row, proceed in a similar 
manner for each section of pipe serving this 
outlet. For each section of pipe, determine 
the total gas demand supplied by that 
section. Where gas piping sections serve 
both heating and cooling equipment and the 
installation prevents both units from 
operating simultaneously, only the larg- 
er of the two demand loads need be used in 
sizing these sections. 

(6) Size each section of branch piping not 
previously sized by measuring the distance 
from the gas meter location to the most 
remote outlet in that branch and follow the 
procedures of steps 2, 3, 4, and 5 above. 

Note: 

Size branch piping in the order of their distance from 
the meter location, beginning with the most distant 
outlet not previously sized. 

1217.3 For conditions other than those covered by 
Section 1217.1, such as longer runs or greater gas 
demands, the size of each gas piping system shall 
be determined by standard engineering methods 
acceptable to the Authority Having Jurisdiction, 
and each such system shall be so designed that the 
total pressure drop between the meter or other 
point of supply and any outlet when full demand 
is being supplied to all outlets, will at no time 
exceed five-tenths (0.5) inches (12.7 mm) water 
column pressure. 

1217.4 Where the gas pressure may be higher 
than fourteen (14) inches (356 mm) or lower 
than six (6) inches (152 mm) of water column, or 
when diversity demand factors are used, the 
design, pipe, sizing, materials, location, and use 
of such systems first shall be approved by the 
Authority Having Jurisdiction. Piping systems 
designed for pressures higher than the serving 
gas supplier's standard delivery pressure shall 
have prior verification from the gas supplier of 
the availability of the design pressure. Systems 
using undiluted liquefied petroleum gas may be 
sized using Table 12-11 for steel pipe and Table 
12-23 for CSST for eleven (11) inches (279 mm) 
water column and in accordance with the 
provisions of Sections 1217.1 and 1217.2. For 
copper tubing systems using undiluted 
liquefied petroleum gas, the capacity of the 
tubing shall be determined by multiplying the 
values of Table 12-15 by the appropriate factor 
from Table 12-16. 



165 



Figure 12-2 



UNIFORM PLUMBING CODE 



Figure 12-2 Example lllustratiing Use of Tables 12-1 and 12-7 

Problem: Determine the required pipe size of each section and outlet of the piping system shown in Figure 12- 
2. Gas to be used has a specific gravity of sixty hundredths (0.60) and eleven hundred (1100) Btu per cubic foot 
(11.4 Watt-hour /L), delivered at eight (8) inch (203 mm) water column pressure. 











150,000 btu/h 






* (43,950 W) 








Furnace 






■0-- 








■G 


>■*« 






■-i 


m 






■^ 


Mr 5i 






■W' 


LET 




Section 3 




Section 2 Section 1 > 




20" 




10* 10' 


• ' 


-(6096 mm) -^ 


— ■ 


(3048 mml (3048 mm) 










\ o 




ts 






c 




o 






H 




^S 




o 




4 


3 - 
3, 




c 


\w 




O 


B 


Gasf 


'AeXm 








, 



30 gallon (113.6 
Automatic 
Water Heater 



en 

3 

Q3S 
Refrigerator' 



Solution: 

(1) Maximum gas demand of outlet A — 

32 cubic feet per hour (0.21 L/sec.) (from Table 12-1). 
Maximum gas demand of outlet B — 

3 cubic feet per hour (0.02 L/sec.) (from Table 12-1). 
Maximum gas demand of outlet C — 

59 cubic feet per hour (0.46 L/sec.) (from Table 12-1). 
Maximum gas demand of outlet D — 

136 cubic feet per hour (1.1 L/sec.) (150,000 Btu/hour [43,950 W]) 

divided by 1100 Btu per cubic foot (11.4 Watt-hour /L) 

(2) The length of pipe from the gas meter to the most remote outlet (outlet A) is 60 feet (18,288 mm). 

(3) Using the length in feet column row marked 60 feet (18,288 mm) in Table 12-7: 

Outlet A, supplying 32 cubic feet per hour (0.21 L/sec), requires one-half (1/2) inch (15 mm) pipe. Section 
1, supplying outlets A and B, or 35 cubic feet per hour (0.24 L/sec.) requires one-half (1/2) inch (15 mm) 
pipe. 

Section 2, supplying outlets A, B, and C, or 94 cubic feet per hour (0.7 L/sec.) requires three-quarter (3/4) 
inch (20 mm) pipe. 

Section 3, supplying outlets A, B, C, and D, or 230 cubic feet per hour (1.8 L/sec), requires one (1) inch (25 
mm) pipe. 

(4) Using the column marked 60 feet (18288 mm) in Table 12-7 (no column for actual length of 55 feet (16764 
mm): Outlet B supplying 3 cubic feet per hour (0.02 L/sec), requires one-half (1/2) inch (15 mm) pipe. 

Outlet C, supplying 59 cubic feet per hour (0.46 L/sec), requires one-half (1/2) inch (15 mm) pipe. 

(5) Using the column marked 50 feet (15,240 mm) in Table 12-7: 

Outlet D, supplying 136 cubic feet per hour (1.1 L/sec), requires three-quarter (3/4) inch (20 mm) pipe. 



166 



FUEL PIPING 



Table 12-7 



Table 12-7 Sizing 


of IPS Gas Piping 






























Gas 


Natural 






Pressure Drop 


0.5 in. w.c. 






Specif] 


Lc Gravity 




0.60 


Pipe Size, inches 




1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


3-1/2 


4 


Length 
feet 






Maximum Capacity in Cubic Feet of Gas per 


Hour 






10 


174 


363 


684 


1,404 


2,103 


4,050 


6,455 


11,412 


16,709 


23,277 


20 


119 


249 


470 


965 


1,445 


2,784 


4,437 


7,843 


11,484 


15,998 


30 


96 


200 


377 


175 


1,161 


2,235 


3,563 


6,299 


9,222 


12,847 


40 


82 


171 


323 


663 


993 


1,913 


3,049 


5,391 


7,893 


10,995 


50 


73 


152 


286 


588 


880 


1,696 


2,703 


4,778 


6,995 


9,745 


60 


66 


138 


259 


532 


798 


1,536 


2,449 


4,329 


6,338 


8,830 


70 


61 


127 


239 


490 


734 


1,413 


2,253 


3,983 


5,831 


8,123 


80 


56 


118 


222 


456 


683 


1,315 


2,096 


3,705 


5,425 


7,557 


90 


53 


111 


208 


428 


641 


1,234 


1,966 


3,476 


5,090 


7,091 


100 


50 


104 


197 


404 


605 


1,165 


1,857 


3,284 


4,808 


6,698 


125 


44 


93 


174 


358 


536 


1,033 


1,646 


2,910 


4,261 


5,936 


150 


40 


84 


158 


324 


486 


936 


1,492 


2,637 


3,861 


5,378 


200 


34 


72 


135 


278 


416 


801 


1,277 


2,257 


3,304 


4,603 


250 


30 


64 


120 


246 


369 


710 


1,131 


2,000 


2,929 


4,080 


300 


28 


58 


109 


223 


334 


643 


1,025 


1,812 


2,654 


3,697 


350 


25 


53 


100 


205 


307 


592 


943 


1,667 


2,441 


3,401 


400 


24 


49 


93 


191 


286 


551 


877 


1,551 


2,271 


3,164 


450 


22 


46 


87 


179 


268 


517 


823 


1,455 


2,131 


2,968 


500 


21 


44 


82 


169 


253 


488 


778 


1,375 


2,013 


2,804 


550 


20 


42 


78 


161 


241 


463 


739 


1,306 


1,912 


2,663 


600 


19 


40 


75 


153 


230 


442 


705 


1.246 


1,824 


2,541 



167 



Table 12-7 (Metric) 



UNIFORM PLUMBING CODE 



Table 12-7 (Metric) Sizing of IPS Gas 


} Piping 


























Gas 


Natural 




Pressure Drop 


12.7 mm w.c. 




Specific Gravity 


0.60 


Pipe Size, millimeters 




15 


20 


25 


32 


40 


50 


65 


80 


90 


100 


Length 
meters 


Maximum Delivery Capacity in Liters per Second 


3.0 


1.4 


2.9 


5.4 


11.0 


16.5 


31.9 


50.8 


89.8 


131.4 


183.1 


6.0 


0.9 


2.0 


3.7 


7.6 


11.4 


21.9 


34.9 


61.7 


90.3 


125.9 


9.0 


0.8 


1.6 


3.0 


6.1 


9.1 


17.6 


28.0 


49.6 


72.5 


101.1 


12.2 


0.6 


1.3 


2.5 


5.2 


7.8 


15.1 


24.0 


42.4 


62.1 


86.5 


15.2 


0.6 


1.2 


2.3 


4.6 


6.9 


13.3 


21.3 


37.6 


55.0 


76.7 


18.2 


0.5 


1.1 


2.0 


4.2 


6.3 


12.1 


19.3 


34.1 


49.9 


69.5 


21.3 


0.5 


1.0 


1.9 


3.9 


5.8 


11.1 


17.7 


31.3 


45.9 


63.9 


24.0 


0.4 


0.9 


1.7 


3.6 J 


5.4 


10.3 


16.5 


29.1 


42.7 


59.5 


27.4 


0.4 


0.9 


1.6 


3.4 


5.0 


9.7 


15.5 


27.3 


40.0 


.55.8 


30.4 


0.4 


0.8 


1.5 


3.2 


4.8 


9.2 


14.6 


25.8 


37.8 


52.7 


38.0 


0.3 


0.7 


1.4 


2.8 


4.2 


8.1 


13.0 


22.9 


33.5 


46.7 


45.6 


0.3 


0.7 


1.2 


2.6 


3.8 


7.4 


11.7 


20.7 


30.4 


42.3 


60.8 


0.3 


0.6 


1.1 


2.2 


3.3 


6.3 


10.0 


17.8 


26.0 


36.2 


76.0 


0.2 


0.6 


0.9 


1.9 


2.9 


5.6 


8.9 


15.7 


23.0 


32.1 


91.2 


0.2 


0.5 


0.9 


1.8 


2.6 


5.1 


8.1 


14.3 


20.9 


29.1 


106.4 


0.2 


0.4 


0.8 


1.6 


2.4 


4.7 


7.4 


13.1 


19.2 


26.8 


121.6 


0.2 


0.4 


0.7 


1.5 


2.2 


4.3 


6.9 


12.2 


17.9 


24.9 


136.8 


0.2 


0.4 


0.7 


1.4 


2.1 


4.1 


6.5 


11.4 


16.8 


23.4 


152.0 


0.2 


0.3 


0.6 


1.3 


2.0 


3.8 


6.1 


10.8 


15.8 


22.1 


167.2 


0.2 


0.3 


0.6 


1.3 


1.9 


3.6 


5.8 


10.3 


15.0 


21.0 


182.4 


0.1 


0.3 


0.6 


1.2 


1.8 


3.5 


5.5 


9.8 


14.3 


20.0 



168 



FUEL PIPING 

Table 12-8 Sizing of Medium Pressure Gas 


Piping 










Table 12-8 














Gas 


Natural 




Inlet Pressure 


2.0 psi 




Pressure Drop 


1.5 psi 




Specific Gravity 


0.6 


Pine Size, inrhps 




1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


5 


6 


Length 
feet 








Capacity in 


Cubic Feet of Gas per Hour 






50 


466 


974 


1,834 


3,766 


5,642 


10,867 


17,320 


30,618 








100 


320 


669 


1,261 


2,588 


3,878 


7,469 


11,904 


21,044 








150 


257 


537 


1,012 


2,078 


3,114 


5,998 


9,559 


16,899 








200 


220 


460 


866 


1,799 


2,665 


5,133 


8,181 


14,463 








250 


195 


408 


768 


1,577 


2,362 


4,549 


7,251 


12,818 








300 


177 


369 


696 


1,429 


2,140 


4,122 


6,570 


11,614 








350 


163 


340 


640 


1,314 


1,969 


3,792 


6,044 


10,685 








400 


151 


316 


595 


1,223 


1,832 


3,528 


5,623 


9,940 








450 


142 


297 


559 


1,147 


1,719 


3,310 


5,276 


9,327 








500 


134 


280 


528 


1,084 


1,624 


3,127 


4,984 


8,810 








550 


127 


266 


501 


1,029 


1,542 


2,970 


4,733 


8,367 








600 


121 


254 


478 


982 


1,471 


2,833 


4,515 


7,983 








650 


116 


243 


458 


940 


1,409 


2,713 


4,324 


7,644 


15,592 






700 


112 


234 


440 


903 


1,353 


2,606 


4,154 


7,344 


14,979 






750 


108 


225 


424 


870 


1,304 


2,511 


4,002 


7,075 


14430 






800 


104 


217 


409 


840 


1,259 


2,425 


3,865 


6,832 


13,935 






850 


101 


210 


396 


813 


1,218 


2,347 


3,740 


6,612 


13,486 






900 


97 


204 


384 


788 


1,181 


2,275 


3,625 


6,410 


13,075 






950 


95 


198 


373 


766 


1,147 


2,209 


3,522 


6,225 


12,698 






1000 


92 


193 


363 


745 


1,116 


2,149 


3,425 


6,055 


12,351 






1100 


87 


183 


345 


707 


1,060 


2,041 


3,253 


5,751 


11,730 






1200 


83 


174 


329 


675 


1,011 


1,947 


3,103 


5,486 


11,190 






1300 


80 


167 


315 


646 


968 


1,865 


2,972 


5,254 


10,716 






1400 


77 


161 


302 


621 


930 


1,791 


2,855 


5,047 


10,295 






1500 


74 


155 


291 


598 


896 


1,726 


2,751 


4,862 


9,918 


17,943 


29,054 


1600 


71 


149 


281 


578 


865 


1,667 


2,656 


4,696 


9,578 


17,327 


28,057 


1700 


69 


145 


272 


559 


837 


1,613 


2,570 


4,544 


9,269 


16,768 


27,151 


1800 


67 


140 


264 


542 


812 


1,564 


2,492 


4,406 


8,986 


16,258 


26,325 


1900 


65 


136 


256 


526 


788 


1,519 


2,420 


4,279 


8,727 


15,789 


25,566 


2000 


63 


132 


249 


512 


767 


1,477 


2,354 


4,162 


8,488 


15357 


24,866 


2100 


62 


129 


243 


499 


747 


1,439 


2,293 


4,053 


8,267 


14,957 


24,218 


2200 


60 


126 


237 


486 


728 


1,403 


2,236 


3,953 


8,062 


14,585 


23,616 


2300 


59 


123 


231 


475 


711 


1,369 


2,183 


3,859 


7,870 


14,238 


23,055 


2400 


57 


120 


226 


464 


695 


1,338 


2,133 


3,771 


7,691 


13,914 


22,531 


2500 


56 


117 


221 


454 


680 


1,309 


2,086 


3,688 


7,523 


13,610 


22,038 


2600 


5,=? 


115 


216 


444 


m 


1,282 


2,043 


3,611 


7,365 


13,325 


21.576 



169 



Table 12-8 (Metric) 



UNIFORM PLUMBING CODE 



Table 12-8 (Metric) Sizing of Medium Pressure Gas Piping 



Gas 



Inlet Pressure 



Pressure Drop 



Specific Gravity 



Natural 



13.8 kPa 



10.3 kPa 



0.60 













Pipe Size, millimeters 










15 


20 


25 


32 


40 


50 


65 


80 


100 


125 


150 


Length 
meters 








Capacity in 


Liters per Second 










15.2 


3.7 


77 


14.4 


29.6 


44.4 


85.5 


136.3 


240.9 








30.4 


2.5 


5.3 


9.9 


20.4 


30.5 


58.8 


93.6 


165.6 








45.6 


2.0 


4.2 


8.0 


16.4 


24.5 


47.2 


75.2 


132.9 








60.8 


1.7 


3.6 


6.8 


14.0 


21.0 


40.4 


64.4 


113.8 








76.0 


1.5 


3.2 


6.0 


12.4 


18.6 


35.8 


57.0 


100.8 








91.2 


1.4 


2.9 


55 


11.2 


16.8 


32.4 


51.7 


91.4 








106.4 


1.3 


2.7 


5.0 


10.3 


15.5 


29.8 


47.6 


84.1 








121.6 


1.2 


2.5 


4.7 


9.6 


14.4 


27.8 


44.2 


78.2 








136.8 


1.1 


2.3 


4.4 


9.0 


13.5 


26.0 


41.5 


73.4 








152.0 


1.1 


2.2 


4.2 


8.5 


12.8 


24.6 


39.2 


69.3 








167.2 


1.0 


2.1 


3.9 


8.1 


12.1 


23.4 


37.2 


65.8 








182.4 


1.0 


2.0 


3.8 


in 


11.6 


22.3 


35.5 


62.8 








197.6 


0.9 


1.9 


3.6 


7.4 


11.1 


21.3 


34.0 


60.1 








212.8 


0.9 


1.8 


3.5 


7.1 


10.6 


20.5 


32.7 


57.8 


117.8 






228.0 


0.8 


1.8 


3.3 


6.8 


10.3 


19.8 


31.5 


55.7 


113.5 






243.2 


0.8 


1.7 


3.2 


6.6 


9.9 


19.1 


30.4 


53.7 


109.6 






258.4 


0.8 


1.7 


3.1 


6.4 


9.6 


18.5 


29.4 


52.0 


106.1 






273.6 


0.8 


1.6 


3.0 


6.2 


9.3 


17.9 


28.5 


50.4 


102.9 






288.8 


0.7 


1.6 


2.9 


6.0 


9.0 


17.4 


27.7 


49.0 


99.9 






304.0 


0.7 


1.5 


2.9 


5.9 


8.8 


16.9 


26.9 


47.6 


97.2 






334.4 


0.7 


1.4 


2.7 


5.6 


8.3 


16.1 


25.6 


45.2 


92.3 






364.8 


0.7 


1.4 


2.6 


5.3 


8.0 


15.3 


24.4 


43.2 


88.0 






395.2 


0.6 


1.3 


2.5 


5.1 


7.6 


14.7 


23.4 


41.3 


84.3 






425.6 


0.6 


1.3 


2.4 


4.9 


7.3 


14.1 


22.5 


39.7 


81.0 






456.0 


0.6 


1.2 


2.3 


4.7 


7.0 


13.6 


21.6 


38.3 


78.0 


141.2 


228.6 


486.4 


0.6 


1.2 


2.2 


4.5 


6.8 


13.1 


20.9 


36.9 


75.3 


136.3 


220.7 


516.8 


0.5 


1.1 


2.1 


4.4 


6.6 


12.7 


20.2 


35.7 


72.9 


131.9 


213.6 


547.2 


0.5 


1.1 


2.1 


4.3 


6.4 


12.3 


19.6 


34.7 


70.7 


127.9 


207.1 


577.6 


0.5 


1.1 


2.0 


4.1 


6.2 


11.9 


19.0 


33.7 


68.7 


124.2 


201.1 


608.0 


0.5 


1.0 


2.0 


4.0 


6.0 


11.6 


18.5 


32.7 


66.8 


120.8 


195.6 


638.4 


0.5 


1.0 


1.9 


3.9 


5.9 


11.3 


18.0 


31.9 


65.0 


117.7 


190.5 


668.8 


0.5 


1.0 


1.9 


3.8 


5.7 


11.0 


17.6 


31.1 


63.4 


114.7 


185.8 


669.2 


0.5 


1.0 


1.8 


3.7 


5.6 


10.8 


17.2 


30.4 


61.9 


112.0 


181.4 


729.6 


0.5 


0.9 


1.8 


3.6 


5.5 


10.5 


16.8 


29.7 


60.5 


109.5 


177.2 


760.0 


0.4 


0.9 


1.7 


3.6 


5.3 


10.3 


16.4 


29.0 


59.2 


107.1 


173.4 


790.4 


0.4 


0.9 


1.7 


3.5 


5.2 


10.1 


16.1 


28.4 


57.9 


104.8 


169.7 



170 



FUEL PIPING 

Table 12-9 Sizing of Medium Pressure Gas 


Piping 












Table 12-9 














Gas 


Natural 




Inlet Pressure 


3.0 psi 




Pressure Drop 


1.5 psi 




Specific Gravity 


0.60 


Pine Sizp. inrhps 




1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


5 


6 


Length 
feet 








Capacity in Cubic Feet of Gas per 


Hour 






50 


857 


1,793 


3,377 


6,934 


10,389 


20,008 


31,890 


56,376 








100 


589 


1,232 


2,321 


4,766 


7,140 


13,752 


21,918 


38,747 








150 


473 


990 


1.864 


3.827 


5.734 


11.043 


17.601 


31.115 








200 


405 


847 


1,595 


3,275 


4,908 


9,451 


15,064 


26,631 








250 


359 


751 


1.414 


2.903 


4.349 


8.377 


13.351 


23.602 








300 


325 


680 


1,281 


2,630 


3,941 


7,560 


12.097 


21,385 








350 


299 


626 


1,179 


2,420 


3,626 


6,983 


11,129 


19,674 








400 


278 


582 


1,096 


2,251 


3,373 


6,496 


10,353 


18,303 








450 


261 


546 


1,029 


2,112 


3,165 


6,095 


9,714 


17,173 








500 


247 


516 


972 


1,995 


2,989 


5,757 


9,176 


16,222 








550 


234 


490 


923 


1,895 


2,839 


5,468 


8,715 


15,406 








600 


224 


467 


881 


1,808 


2,709 


5„216 


8,314 


14,698 








650 


214 


448 


843 


1,731 


2,594 


4,995 


7,962 


14,075 


28,709 






700 


206 


430 


810 


1,663 


2,492 


4,799 


7,649 


13,522 


27,581 






750 


198 


414 


780 


1,602 


2,401 


4623 


7,369 


13,027 


26,570 






800 


191 


400 


754 


1,547 


2,318 


4,465 


7,116 


12,580 


25,658 






850 


185 


387 


729 


1,497 


2,243 


4,321 


6,886 


12,174 


24„831 






900 


180 


375 


707 


1,452 


2,175 


4,189 


6,677 


11,803 


24,074 






950 


174 


365 


687 


1,410 


2,112 


4,068 


6,484 


11,463 


23,380 






1000 


170 


355 


668 


1,371 


2,055 


3,957 


6,307 


11,149 


22,741 






1100 


161 


337 


634 


1,302 


1,951 


3,758 


5,990 


10,589 


21,598 






1200 


154 


321 


605 


1,242 


1,862 


3,585 


5,714 


10,102 


20,605 






1300 


147 


308 


580 


1,190 


1,783 


3,433 


5,472 


9,674 


19,731 






1400 


141 


296 


557 


1,143 


1,713 


3,298 


5,257 


9,294 


18,956 






1500 


136 


285 


536 


1,101 


1,650 


3,178 


5,064 


8,953 


18,262 


33,038 


53,496 


1600 


131 


275 


518 


1,063 


1,593 


3,069 


4,891 


8,646 


17,635 


31,904 


51,660 


1700 


127 


266 


501 


1,029 


1,542 


2,970 


4,733 


8,367 


17,066 


30,875 


49,993 


1800 


123 


258 


486 


998 


1,495 


2,879 


4,589 


8,112 


16,546 


29,935 


48,471 


1900 


120 


251 


472 


969 


1,452 


2,796 


4,457 


7,878 


16,069 


29,072 


47,074 


2000 


117 


244 


459 


942 


1.412 


2,720 


4.335 


7,663 


15.629 


28.276 


45.785 


2100 


114 


237 


447 


918 


1.375 


2,649 


4.222 


7,463 


15,222 


27,539 


44,593 


2200 


111 


231 


436 


895 


1,341 


2,583 


4,117 


7,278 


14„844 


26,855 


43,484 


2300 


108 


226 


426 


874 


1.309 


2.522 


4.019 


7.105 


14,491 


26,217 


42.451 


2400 


106 


221 


416 


854 


1.279 


2,464 


3.927 


6.943 


14.161 


25,620 


41,485 


2500 


103 


216 


407 


835 


1,252 


2,410 


3,842 


6,791 


13,852 


25,060 


40,579 


2600 


101 


211 


398 


818 


1,225 


2,360 


3,761 


6,649 


13,561 


24,534 


39,727 



171 



Table 12-9 (Metric) 



UNIFORM PLUMBING CODE 



Table 12-9 (Metric) Sizing of Medium Pressure Gas 


Piping 


























Gas 


Natural 




Inlet Pressure 


20.7 kPa 




Pressure Drop 


10.3 kPa 




Specific Gravity 


0.60 


Pipe Size, millimeters 




15 


20 


25 


32 


40 


50 


65 


80 


100 


125 


150 


Length 
meters 


Capacity in Liters per Second 


15.2 


6.7 


14.1 


26.6 


54.5 


81.7 


157..4 


250.9 


443.5 








30.4 


4.6 


9.7 


18.3 


37.5 


56.2 


108.2 


172.4 


304.8 








45.6 


3.7 


7.8 


14.7 


30.1 


45.1 


86.9 


138.5 


244.8 








60.8 


3.2 


6.7 


12.6 


25.8 


38.6 


74.4 


118.5 


209.5 








76.0 


2.8 


5.9 


11.1 


22.8 


34.2 


65.9 


105.0 


185.7 








91.2 


2.6 


L 5.4 


10.1 


20.7 


31.0 


59.7 


95.2 


168.2 








106.4 


2.4 


4.9 


9.3 


19.0 


28.5 


54.9 


87.6 


154.8 








121.6 


2.2 


4.6 


8.6 


17.7 


26.5 


51.1 


81.5 


144.0 








136.8 


2.1 


4.3 


8.1 


16.6 


24.9 


47.9 


76.4 


135.1 








152.0 


1.9 


4.1 


7.6 


15.7 


23.5 


45.3 


72.2 


127.6 








167.2 


1.8 


3.9 


7.3 


14.9 


22.3 


43.0 


68.6 


121.2 








183.4 


1.8 


3.7 


6.9 


14.2 


21.3 


41.0 


65.4 


115.6 








197.6 


1.7 


3.5 


6.6 


13.6 


20.4 


39.3 


62.6 


110.7 


225.9 






212.8 


1.6 


3.4 


6.4 


13.1 


19.6 


37.8 


60.2 


106.4 


217.0 






228.0 


1.6 


3.3 


6.1 


12.6 


18.9 


36.4 


58.0 


102.5 


209.0 






243.2 


1.5 


3.1 


5.9 


12.2 


18.2 


35.1 


56.0 


99.0 


201.9 






258.4 


1.5 


3.0 


5.7 


11.8 


17.6 


34.0 


54.2 


95.8 


195.3 






273.6 


1.4 


"3.0 


5.6 


11.4 


17.1 


33.0 


52.5 


92.9 


189.4 






288.8 


1.4 


2.9 


5.4 


11.1 


16.6 


32.0 


51.0 


90.2 


183.9 






304.0 


1.3 


2.8 


5.3 


10.8 


16.2 


31.1 


49.6 


87.7 


178.9 






334.4 


1.3 


2.6 


5.0 


10.2 


15.4 


29.6 


47.1 


83.3 


169.9 






364.8 


1.2 


2.5 


4.8 


9.8 


14.6 


28.2 


45.0 


79.5 


162.1 






395.2 


1.2 


2.4 


4.6 


9.4 


14.0 


27.0 


43.0 


76.1 


155.2 






425.6 


1.1 


2.3 


4.4 


9.0 


13.5 


25.9 


41.4 


73.1 


149.1 






456.0 


1.1 


2.2 


4.2 


8.7 


13.0 


25.0 


39.8 


70.4 


143.7 






486.4 


1.0 


2.2 


4.1 


8.4 


12.5 


24.1 


38.5 


68.0 


138.7 


251.0 


406.4 


516.8 


1.0 


2.1 


3.9 


8.1 


12.1 


23.4 


37.2 


65.8 


134.3 


242.9 


393.3 


547.2 


1.0 


2.0 


3.8 


7.8 


11.8 


22.6 


36.1 


63.8 


130.2 


235.5 


381.3 


577.6 


0.9 


2.0 


3.7 


7.6 


11.4 


22.0 


35.1 


62.0 


126.4 


228.7 


370.3 


608.0 


0.9 


1.9 


3.6 


7.4 


11.1 


21.4 


34.1 


60.3 


123.0 


222.4 


360.2 


638.4 


0.9 


1.9 


3.5 


7.2 


10.8 


20.8 


33.2 


58.7 


119.8 


216.7 


350.8 


668.8 


0.9 


1.8 


3.4 


7.0 


10.6 


20.3 


32.4 


57.3 


116.8 


211.3 


342.1 


669.2 


0.9 


1.8 


3.3 


6.9 


10.3 


19.8 


31.6 


55.9 


114.0 


206.2 


334.0 


729.6 


0.8 


1.7 


3.3 


6.7 


10.1 


19.4 


30.9 


54.6 


111.4 


201.6 


326.4 


760.0 


0.8 


1.7 


3.2 


6.6 


9.8 


19.0 


30.2 


53.4 


109.0 


197.2 


319.2 


790.4 


0.8 


1.7 


3.1 


6.4 


9.6 


18.6 


29.6 


52.3 


106.7 


193.0 


312.5 



172 



FUEL PIPING 

Table 12-10 Sizing of Medium Pressure Gas Piping 










Table 12-10 














Gas 


Natural 




Inlet Pressure 


5.0 


psi 






Pressure Drop 


1.5 


psi 






Specific Gravity 


0.60 


Pipe Size, inches 




1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


5 


6 


Length 
fee! 


Capacity in Cubic Feet of Gas per Hour 


50 


1,399 


2,925 


5,509 


11,311 


16,947 


32,638 


52,020 


91,962 








100 


961 


2,010 


3,786 


7,774 


11,648 


22,432 


35,753 


63,205 








150 


772 


1,614 


3,041 


6,243 


9,353 


18,014 


28,711 


50,756 








200 


661 


1,381 


2,602 


5,343 


8,005 


15,417 


24,573 


43,441 








250 


586 


1,224 


2,306 


4,735 


7,095 


13,664 


21,779 


38,501 








300 


531 


1,109 


2,090 


4,291 


6,429 


12,381 


19,733 


34,884 








350 


488 


1,021 


1,923 


3,947 


5,914 


11,390 


18,154 


32,093 








400 


454 


949 


1,789 


3,672 


5,502 


10,596 


16,889 


29,865 








450 


426 


891 


1,678 


3,445 


5,162 


9,942 


15,846 


28,013 








500 


402 


842 


1,585 


3,255 


4,876 


9,391 


14,968 


26,461 








550 


382 


799 


1,506 


3,091 


4,631 


8,919 


14,216 


25,131 








600 


365 


762 


1,436 


2,949 


4,418 


8,509 


13,562 


23,976 








650 


349 


730 


1,375 


2,824 


4,231 


8,149 


12,988 


22,960 


46,830 






700 


335 


701 


1,321 


2,713 


4,065 


7,828 


12,477 


22,057 


44,990 






750 


323 


676 


1,273 


2,614 


3,916 


7,542 


12,020 


21,249 


43,342 






800 


312 


653 


1,229 


2,524 


3,781 


7,283 


11,608 


20,520 


41,855 






850 


302 


632 


1,190 


2,442 


3,659 


7,048 


11,233 


19,858 


40,504 






900 


293 


612 


1,153 


2,368 


3,548 


6,833 


10,891 


19,253 


39,271 






950 


284 


595 


1,120 


2,300 


3,446 


6,636 


10,577 


18,698 


38,139 






1000 


277 


578 


1,089 


2,237 


3,351 


6,455 


10,288 


18,187 


37,095 






1100 


263 


549 


1,035 


2,124 


3,183 


6,130 


9,771 


17,273 


35,231 






1200 


251 


524 


987 


2,027 


3,037 


5,848 


9,321 


16,478 


33,611 






1300 


240 


502 


945 


1,941 


2,908 


5,600 


8,926 


15,780 


32,186 






1400 


231 


482 


908 


1,865 


2,794 


5,380 


8,575 


15,160 


30,921 






1500 


222 


464 


875 


1,796 


2,691 


5,183 


8,261 


14,605 


29,789 


53,892 


87,263 


1600 


214 


449 


845 


1,735 


2,599 


5,005 


7,978 


14,103 


28,766 


52,043 


84,269 


1700 


208 


434 


818 


1,679 


2,515 


4,844 


7,720 


13,648 


27,838 


50,363 


81,550 


1800 


201 


421 


798 


1,628 


2,439 


4,696 


7,485 


13,233 


26,991 


48,830 


79,067 


1900 


195 


409 


770 


1,581 


2,368 


4,561 


7,270 


12,851 


26,213 


47,422 


76,787 


2000 


190 


398 


749 


1,537 


2,303 


4,436 


7,071 


12,500 


25,495 


46,124 


74,686 


2100 


185 


387 


729 


1,497 


2,243 


4,321 


6,886 


12,174 


24,831 


44,923 


72,740 


2200 


181 


378 


711 


1,460 


2,188 


4,213 


6,715 


11,871 


24,214 


43,806 


70,932 


2300 


176 


369 


694 


1,425 


2,136 


4,113 


6,556 


11,589 


23,639 


42,765 


69,247 


2400 


172 


360 


678 


1,393 


2,087 


4,020 


6,406 


11,326 


23,100 


41,792 


67,671 


2500 


168 


352 


664 


1,363 


2,042 


3,932 


6,267 


11,078 


22,596 


40,879 


66,193 


2600 


165 


345 


650 


1,334 


1,999 


3,849 


6,135 


10,846 


22,121 


40,021 


64,803 



173 



Table 12-10 (Metric) 



UNIFORM PLUMBING CODE 



Table 12-10 (Metric) Sizing of Medium Pressure Gas Piping 



Gas 



Inlet Pressure 



Pressure Drop 



Specific Gravity 



Natural 



34.5 kPa 



10.3 kPa 



0.60 













Pitje Size, millimeters 










15 


20 


25 


32 


40 


50 


65 


80 


100 


125 


150 


Length 
meters 








Capacity in 


Liters per Second 










15.2 


11.0 


23.0 


46.3 


89.0 


133.3 


256.8 


409.2 


723.5 








30.4 


7.6 


15.8 


29.8 


61.2 


91.6 


176.5 


281.3 


497.2 








45.6 


6.1 


12.7 


23.9 


49.1 


73.6 


141.7 


225.9 


399.3 








60.8 


5.2 


10.9 


20.5 


42.0 


63.0 


121.3 


193.3 


341.7 








76.0 


4.6 


9.6 


18.1 


37.3 


55.8 


107.5 


171.3 


302.9 








91.2 


4.2 


8.7 


16.4 


33.8 


50.6 


97.4 


155.2 


274.4 








106.4 


3.8 


8.0 


15.1 


31.1 


46.5 


89.6 


142.8 


252.5 








121.6 


3.6 


7.5 


14.1 


28.9 


43.3 


83.4 


132.9 


234.9 








136.8 


3.4 


7.0 


13.0 


27.1 


40.6 


78.2 


124.7 


220.4 








152.0 


3.2 


6.6 


12.5 


25.6 


38.4 


73.9 


117.8 


208.2 








167.2 


3.0 


6.3 


11.8 


24.3 


36.4 


70.2 


111.8 


197.7 








182.4 


2.9 


6.0 


11.3 


23.2 


34.8 


66.9 


106.7 


188.6 








197.6 


2.7 


5.7 


10.8 


22.2 


33.3 


64.1 


102.2 


180.6 


368.4 






212.8 


2.6 


5.5 


10.4 


21.3 


32.0 


61.6 


98.2 


173.5 


353.9 






228.0 


2.5 


5.3 


10.0 


20.6 


30.8 


59.3 


94.6 


167.2 


341.0 






243.2 


2.5 


5.1 


9.7 


19.9 


39.7 


57.3 


91.3 


161.4 


329.3 






258.4 


2.4 


5.0 


9.4 


19.2 


28.8 


55.4 


88.4 


156.2 


318.6 






273.6 


2.3 


4.8 


9.1 


18.6 


27.9 


53.8 


85.7 


151.5 


308.9 






288.0 


2.2 


4.7 


8.8 


18.1 


27.1 


52.2 


83.2 


147.1 


300.0 






304.0 


2.2 


4.6 


8.6 


17.6 


26.4 


50.8 


80.9 


143.1 


291.8 






334.4 


2.1 


4.3 


8.1 


16.7 


25.0 


48.2 


76.9 


135.9 


277.2 






364.8 


2.0 


4.1 


7.8 


15.9 


23.9 


46.0 


73.3 


129.6 


264.4 






395.2 


1.9 


3.9 


7.4 


15.3 


22.9 


44.1 


70.2 


124.1 


253.2 






425.6 


1.8 


3.8 


7.1 


14.7 


22.0 


42.3 


67.5 


119.3 


243.3 






456.0 


1.7 


3.7 


6.9 


14.1 


21.2 


40.8 


65.0 


114.9 


234.3 


424.0 


686.5 


486.4 


1.7 


3.5 


6.6 


13.6 


20.4 


39.4 


62.8 


ni.o 


226.3 


409.4 


662.9 


516.8 


1.6 


3.4 


6.4 


13.2 


19.8 


,38.1 


60.7 


107.4 


219.0 


396.2 


641.6 


547.2 


1.6 


3.3 


6.2 


12.8 


19.2 


36.9 


58.9 


104.1 


212.3 


384.1 


622.0 


577.6 


1.5 


3.2 


6.1 


12.4 


18.6 


35.9 


57.2 


101.1 


206.2 


373.1 


604.1 


608.0 


1.5 


3.1 


5.9 


12.1 


18.1 


34.9 


55.6 


98.3 


200.6 


362.9 


587.6 


638.4 


1.5 


3.0 


5.7 


11.8 


17.6 


34.0 


54.2 


95.8 


195.3 


353.4 


572.2 


668.8 


1.4 


3.0 


5.6 


11.5 


17.2 


33.1 


52.8 


93.4 


190.5 


344.6 


558.0 


699.2 


1.4 


2.9 


5.5 


11.2 


16.8 


32.4 


51.6 


91.2 


186.0 


336.4 


544.8 


729.6 


1.4 


2.8 


5.3 


11.0 


16.4 


31.6 


50.4 


89.1 


181.7 


328.8 


532.4 


760.0 


1.3 


2.8 


5.2 


10.7 


16.1 


30.9 


49.3 


87.2 


177.8 


321.6 


520.7 


790.4 


1.3 


2.7 


5.1 


10.5 


15.7 


30.3 


48.3 


85.3 


174.0 


314.8 


509.8 



174 



FUEL PIPING 



Table 12-11 



Table 12-11 Low-Pressure LPG Pipe Sizing 





Gas 


Undiluted LPG 




Inlet Pressure 


11 in. w.c. 




Pressure Drop 


0.5 in. w.c. 


Pipe Size, inches 




1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


Length 
feet 


Maximum Capacity in Thousands of Btu per Hour 


10 


275 


567 


1071 


2205 


3307 


6221 


20 


189 


393 


732 


1496 


2299 


4331 


30 


152 


315 


590 


1212 


1858 


3465 


40 


129 


267 


504 


1039 


1559 


2992 


50 


114 


237 


448 


913 


1417 


2646 


60 


103 


217 . 


409 


834 


1275 


2394 


70 


96 


196 


378 


771 


1181 


2205 


80 


89 


185 


346 


724 


1086 


2047 


90 


83 


173 


322 


677 


1023 


1921 


100 


78 


162 


307 


630 


976 


1811 


125 


69 


146 


275 


567 


866 


1606 


150 


63 


132 


252 


511 


im 


1496 


200 


55 


112 


213 


440 


675 


1280 



Table 12-11 (Metric) Low-Pressure LPG Pipe Sizing 





Gas 


Undiluted LPG 




Inlet Pressure 


279 


mm w.c. 






Pressure Drop 


12.7 


mm w.c. 




Pipe Size, millimeters 




15 


20 


25 


32 


40 


50 


Length 
meters 




Maximi 


im Capacity in Thousands of Wai 


tts 


3.0 


80.6 


166.1 


313.8 


646.1 


969.0 


1822.8 


6.1 


55.4 


115.2 


214.5 


438.3 


673.6 


1269.0 


9.1 


44.5 


92.3 


172.9 


355.1 


544.4 


1015.2 


12.2 


37.8 


78.2 


147.7 


304.4 


456.8 


876.7 


15.2 


33.4 


69.4 


131.3 


267.5 


415.2 


775.3 


18.2 


30.2 


63.6 


119.8 


244.4 


373.6 


701.4 


21.3 


28.1 


57.4 


110.8 


225.9 


346.0 


646.1 


24.3 


26.1 


54.2 


101.4 


212.1 


318.2 


600.0 


27.4 


24.3 


50.7 


94.4 


198.4 


299.7 


562.9 


30.4 


22.9 


47.5 


90.0 


184.6 


286.0 


530.6 


38.0 


20.2 


42.8 


80.6 


166.1 


253.7 


470.6 




45.6 


18.5 


38.7 


73.8 


149.7 


230.6 


438.3 


60.8 


16.1 


32.8 


62.4 


128.9 


197.8 


369.2 



175 



Table 12-12 



UNIFORM PLUMBING CODE 



Table 12-12 Sizing of IPS Pipe for Undiluted LPG 















Gas 


Undiluted LPG 




Inlet Pressure 


10.0 psi 




Pressure Drop 


3.0 psi 




Specific Gravity 


1.52 


Pipe Size, inches 




1/2 


3/4 


1 


1-1/4 


1-1/2 


2 


2-1/2 


3 


4 


5 


6 


Length 
feet 








Maximum Delivery Capacity in 


Cubic Feet per Hour 




50 


1,000 


2,070 


3,899 


8,005 


11,994 


23,100 


36,818 


65,088 








100 


690 


1,423 


2,680 


5,502 


8,244 


15,877 


25,305 


44,734 








150 


550 


1,142 


2,152 


4,418 


6,620 


12,750 


20,321 


35,923 








200 


470 


978 


1,842 


3,782 


5,666 


10,912 


17,392 


30,746 








250 


420 


867 


1,632 


3,351 


5,022 


9,671 


15,414 


27,243 








300 


390 


785 


1,479 


3,037 


4,550 


8,763 


13,966 


24,690 








350 


350 


722 


1,361 


2,794 


4,186 


8,062 


12,849 


22,714 








400 


325 


672 


1,266 


2,599 


3,894 


7,500 


11,953 


21,131 








450 


300 


631 


1,188 


2,439 


3,654 


7,037 


11,215 


19,827 








500 


285 


596 


1,122 


2,303 


3,451 


6,647 


10,594 


18,728 








550 


272 


566 


1,066 


2,188 


3,278 


6,313 


10,062 


17,787 








600 


260 


540 


1,017 


2,087 


3,127 


6,023 


9,599 


16,969 








650 


250 


517 


973 


1,999 


2,995 


5,767 


9,192 


16,250 


33,145 






700 


240 


496 


935 


1,920 


2,877 


5,541 


8,311 


15,611 


31,842 






750 


230 


478 


901 


1,850 


2,772 


5,338 


8,507 


15,040 


30,676 






800 


222 


462 


870 


1,786 


2,676 


5,155 


8,215 


14,523 


29,623 






850 


215 


447 


842 


1,729 


2,590 


4,988 


7,950 


14,055 


28,667 






900 


208 


433 


816 


1,676 


2,511 


4,836 


7,708 


13,627 


27,795 






950 


202 


421 


793 


1,628 


2,439 


4,697 


7,486 


13,234 


26,993 






1,000 


198 


409 


771 


1,583 


2,372 


4,568 


7,281 


12,872 


26,255 






1,100 


188 


389 


732 


1,504 


2,253 


4,339 


6,915 


12,225 


24,935 






1,200 


180 


371 


699 


1,434 


2,149 


4,139 


6,597 


11,663 


23,789 






1,300 


171 


355 


669 


1,374 


2,058 


3,964 


6,318 


11,169 


22,780 






1,400 


164 


341 


643 


1,320 


1,977 


3,808 


6,069 


10,730 


21,885 






1,500 


158 


329 


619 


1,271 


1,905 


3,669 


5,847 


10,337 


21,083 


38,143 


61,762 


1,600 


152 


317 


598 


1,228 


1,839 


3,543 


5,646 


9,982 


20,360 


36,834 


59,643 


1.700 


148 


307 


579 


1.138 


1.780 


3.428 


5.464 


9.660 


19.705 


35.645 


57.718 


1,800 


143 


298 


561 


1,152 


1,726 


3,324 


5,298 


9,366 


19,103 


34,560 


55,961 


1,900 


139 


289 


545 


1,119 


1,676 


3,228 


5,145 


9,096 


18,552 


33,564 


54,348 


2,000 


136 


281 


530 


1,088 


1,630 


3,140 


5,004 


8,847 


18,045 


32,645 


52,860 


2,100 


133 


274 


516 


1,060 


1,588 


3,058 


4,874 


8,616 


17,575 


31,795 


51,483 


2,200 


130 


267 


503 


1,033 


1,548 


2,982 


4,753 


8,402 


17,138 


31,005 


50,204 


2,300 


127 


261 


491 


1,009 


1,512 


2,911 


4,640 


8,203 


16,731 


30,268 


49,011 


2,400 


124 


255 


480 


986 


1,477 


2,845 


4,534 


8,016 


16,350 


29,579 


47,895 


2,500 


121 


249 


470 


964 


1,445 


2,783 


4,435 


7,841 


15,993 


28,933 


46,849 


2,600 


118 


244 


460 


944 


1,415 


2,724 


4,342 


7,676 


15,657 


28,325 


45,865 



176 



FUEL PIPING 



Table 12-12 (Metric) 



Table 12-12 (Metric) Sizing of IPS Pipe for Undiluted LPG 















Gas 


Undiluted LPG 




Inlet Pressure 


68.9 kPa 




Pressure Drop 


20.7 kPa 




Specific 


: Gravity 




1.52 


Pipe Size, millimeters 




15 


20 


25 


32 


40 


50 


65 


80 


100 


125 


150 


Length 
meters 


Maximum Delivery Capacity in Liters per Second 


15.2 


8.0 


16.6 


31.2 


64.0 


96.0 


184.8 


294.5 


520.7 








30.4 


5.5 


11.4 


21.4 


44.0 


66.0 


127.0 


202.4 


357.9 








45.6 


4.4 


9.1 


17.2 


35.3 


53.0 


102.0 


162.6 


287.4 








60.8 


3.8 


7.8 


14.7 


30.3 


45.3 


87.3 


139.1 


246.0 








76.0 


3.4 


6.9 


13.1 


26.8 


40.2 


77.4 


123.3 


218.0 








91.2 


3.0 


6.3 


11.8 


24.3 


36.4 


70.1 


111.7 


197.5 








106.4 


2.8 


5.8 


10.9 


22.4 


33.5 


64.5 


102.8 


181.7 








121.6 


2.6 


5.4 


10.1 


20.8 


31.2 


60.0 


95.6 


169.1 








136.8 


2.4 


5.1 


9.5 


19.5 


29.2 


56.3 


89.7 


158.6 








152.0 


2.3 


4.8 


9.0 


18.4 


27.6 


53.2 


84.8 


149.8 








167.2 


2.2 


4.5 


8.5 


17.5 


26.2 


50.5 


80.5 


142.3 








182.4 


2.1 


4.3 


8.1 


16.7 


25.0 


48.2 


76.8 


135.8 








197.6 


2.0 


4.1 


7.8 


16.0 


24.0 


46.1 


73.5 


130.0 


265.2 






212.8 


1.9 


4.0 


7.5 


15.4 


23.0 


44.3 


70.7 


124.9 


254.7 






228.0 


1.8 


3.8 


7.2 


14.8 


22.2 


42.7 


68.1 


120.3 


245.4 






243.2 


1.8 


3.7 


7.0 


14.3 


21.4 


41.2 


65.7 


116.2 


237.0 






258.4 


1.7 


3.6 


6.7 


13.8 


20.7 


39.9 


63.6 


112.4 


229.3 






273.6 


1.7 


3.5 


6.5 


13.4 


20.1 


38.7 


61.7 


109.0 


222.4 






288.8 


1.6 


3.4 


6.3 


13.0 


19.5 


37.6 


60.0 


105.9 


215.9 






304.0 


1.6 


3.3 


6.2 


12.7 


19.0 


36.5 


58.2 


103.0 


210.0 






334.4 


1.5 


3.1 


5.9 


12.0 


18.0 


34.7 


55.3 


97.8 


199.5 






364.8 


1.4 


3.0 


5.6 


11.5 


17.2 


33.1 


52.8 


93.3 


190.3 






395.2 


1.4 


2.8 


5.4 


11.0 


16.5 


31.7 


50.5 


89.4 


182.2 






425.6 


1.3 


2.7 


5.1 


10.6 


15.8 


30.5 


48.6 


85.8 


175.1 






456.0 


1.3 


2.6 


5.0 


10.2 


15.2 


29.4 


46.8 


82.7 


168.7 


305.1 


494.1 


486.4 


1.2 


2.5 


4.8 


9.8 


14.7 


28.3 


45.2 


79.9 


162.9 


294.7 


477.1 


516.8 


1.2 


2.5 


4.6 


9.1 


14.2 


27.4 


43.7 


77.3 


157.6 


285.2 


461.7 


547.2 


1.1 


2.4 


4.5 


9.2 


13.8 


26.6 


42.4 


74.9 


152.8 


276.5 


447.7 


577.6 


1.1 


2.3 


4.4 


9.0 


13.4 


25.8 


41.2 


72.8 


148.4 


268.5 


434.8 


608.0 


1.1 


2.2 


4.2 


8.7 


13.0 


25.1 


40.0 


70.8 


144.4 


261.2 


422.9 


638.4 


1.1 


2.2 


4.1 


8.5 


12.7 


24.5 


39.0 


68.9 


140.6 


254.4 


411.9 


668.8 


1.0 


2.1 


4.0 


8.3 


12.4 


23.9 


38.0 


67.2 


137.1 


248.1 


401.6 


699.2 


1.0 


2.1 


3.9 


8.1 


12.1 


23.3 


37.1 


65.6 


133.8 


242.1 


392.1 


729.6 


1.0 


2.0 


3.8 


7.9 


11.8 


22.8 


36.3 


64.1 


130.8 


236.6 


383.2 


760.0 


1.0 


2.0 


3.8 


in 


11.6 


22.3 


35.5 


62.7 


127.9 


231.5 


374.8 


790.4 


0.9 


2.0 


3.7 


7.6 


11.3 


21.8 


34.7 


61.4 


125.3 


226.6 


366.9 



177 



Table 12-13 



UNIFORM PLUMBING CODE 



TABLE 12-13 

Capacities of Listed IVIetai Appliance Connectors for Use with Gas Pressures Less Than an 8 Inch 

Water Column 



Semi-rigid Flexible Connector 

Connector Nominal I.D., 

O.D, Inches Inches 1 foot 



Capacities for Various Lengths, in Thousands Btu/h 
(Based on Pressure Drop of 0.2 in. Water Column Natural Gas of 1100 Btu/cu. ft.) 



1-1/2 feet 



2 feet 2-1/2 feet 



3 feet 



4 feet 



5 feet 



6 feet 



All Gas Appliances 



Ranges and Dryers Only 



3/8 


1/4 


28 


23 


20 


19 


17 


1/2 


3/8 


66 


54 


47 


44 


41 


5/8 


1/2 


134 


110 


95 


88 


82 


- 


3/4 


285 


233 


202 


188 


174 


- 


1 


567 


467 


405 


378 


353 



72 



63 



57 



Notes: 

1. Flexible connector listings are based on the nominal internal diameter. 

2. Semi-rigid connector listings are based on the outside diameter. 

3. Gas connectors are certified by the testing agency as complete assemblies, including the fittings and valves. Capacities shown 
are based on the use of fittings and valves supplied with the connector. 

4. Capacities for LPG are 1.6 times the natural gas capacities shown. 

Example: Capacity of a 1 /4 in. flexible connector 1 foot long is 28,000 x 1.6 = 44,800 Btu/h. 



TABLE 12-13 (Metric) 
Capacities of Listed Metal Appliance Connectors for Use with Gas Pressures Less Than a 203 mm 

Water Column 

Capacities for Various Lengths, in Thousands Watts 

Semi-rigid Flexible Connector (Based on Pressure Drop of 50 Pa Water Column Natural Gas of 11.4 Watt-hours/L) 

Connector Nominal LD., 

O.D, mm mm 305 mm 457 mm 610 mm 762 mm 914 mm 1219 mm 1524 mm 1829 mm 



All Gas Appliances 



Ranges and Dryers Only 



10 


6.4 


8.2 


6.7 


5.9 


5.6 


5 


15 


9.5 


19.3 


15.8 


13.8 


12.9 


12 


18 


12.7 


39.3 


32.2 


27.8 


25.8 


24 




19.1 


83.5 


68.3 


59.2 


55.1 


51 




25.9 


166.1 


136.8 


118.7 


110.8 


103.4 



21.1 



18.5 



16.7 



Notes: See Table 12-13 (English units). 

Example: Capacity of a 6.4 mm flexible connector 305 mm long is 8204 x 1.6 = 13,126.4 W. 



178 



FUEL PIPING 



Table 12-14 



TABLE 12-14 

Capacities of Listed Metal Appliance Connectors for Use with Gas Pressures Not Less Than an 8 Inch 

Water Column 



Semi-rigid 
Connector 
O.D, Inches 



Flexible Connector 
Nominal I.D., 

Inches 1 foot 



Capacities for Various Lengths, in Thousands Btu/h 
(Based on Pressure Drop of 0.2" Water Column Natural Gas of 1100 Btu/cu. ft.) 



1-1/2 feet 



2 feet 2-1/2 feet 



3 feet 



4 feet 



5 feet 



6 feet 



All Gas Appliances 



Ranges and Dryers Only 



3/8 
1/2 
5/8 



1/4 
3/8 
1/2 
3/4 
1 



40 

93 

189 

404 

803 



33 

76 

155 

330 

661 



29 

66 

134 

287 

573 



27 

62 

125 

266 

534 



25 

58 

116 

244 

500 



101 



90 



80 



Notes: 

1. Flexible connector listings are based on the nominal internal diameter. 

2. Semi-rigid connector listings are based on the outside diameter. 

3. Gas connectors are certified by the testing agency as complete assemblies, including the fittings and valves. Capacities shown 
are based on the use of fittings and valves supplied with the connector. 

4. Capacities for LPG are 1.6 times the natural gas capacities shown. 

Example: Capacity of a 1/4 in. flexible cormector one (1) foot long is 40,000 x 1.6 = 64,000 Btu/h. 



TABLE 12-14 (Metric) 

Capacities of Listed Metal Appliance Connectors for Use with Gas Pressures Not Less Than a 203 mm 

Water Column 

Capacities for Various Lengths, in Thousands Watts 
Semi-rigid Flexible Connector (Based on Pressure Drop of 50 Pa mm Water Column Natural Gas of 11.4 Watt-hours/L) 

Connector Nominal I.D., 
O.D, mm mm 305 mm 457 mm 610 mm 762 mm 914 mm 1219 mm 1524 mm 1829 mm 



All Gas Appliances 



Ranges and Dryers Only 



10 


6.4 


11.7 


9.7 


8.5 


7.9 


7.3 


15 


9.5 


27.3 


22.3 


- 19.3 


18.2 


17.0 


18 


12.7 


55.4 


45.4 


39.3 


36.6 


34.0 




19.1 


118.4 


96.7 


84.1 


77.9 


71.5 




25.4 


235.3 


193.7 


167.9 


156.5 


146.5 



29.6 



26.4 



23.4 



Notes: See Table 12-14 (English units). 

Example: Capacity of a 6.4 mm flexible connector 0.3 m long is 11,720W x 1.6 = 18,752 W. 



179 



Table 12-1 5 -Table 12-18 



UNIFORM PLUMBING CODE 



Table 12-15 

Copper Tube - Low Pressure 

Maximum Delivery Capacity* of Cubic Feet of Gas Per 

Hour of Copper Tube Carrying Natural Gas of 0.60** 

Specific Gravity at Low Pressure (Less than 14 inches 

Water Column) Based on Pressure Drop of 0.50 Inch 

Water Column 



Length 

of Tube, 

feet 


Outside Diameter of Tube, inches 


3/8 
(10 mm) 


1/2 
(15 mm) 


5/8 
(18 mm) 


3/4 
(20 mm) 


7/8 
(22 mm) 


1-1/8 
(28 mm) 


1-3/8 
(34 mm) 


10 


24 


50 


101 


176 


250 


535 


963 


20 


17 


34 


69 


121 


172 


368 


662 


30 


13 


27 


56 


97 


138 


295 


531 


40 


11 


23 


48 


83 


118 


253 


455 


50 


10 


21 


42 


74 


105 


224 


403 


60 


9.1 


19 


38 


67 


95 


203 


365 


70 


8.4 


17 


35 


62 


84 


197 


336 


80 


7.8 


16 


33 


57 


81 


174 


313 


90 


7.3 


15 


31 


54 


76 


163 


293 


100 


6.9 


14 


29 


51 


72 


154 


277 


125 


6.1 


13 


26 


45 


64 


136 


245 


150 


5.6 


11 


23 


41 


58 


124 


222 


175 


5.1 


11 


21 


38 


53 


114 


205 


200 


4.8 


10 


20 


35 


50 


106 


190 


250 


4.2 


8.7 


18 


31 


44 


94 


169 



*Includes 20% factor for fittings. 

**For other pressure drop values see Table 12-16. 



Table 12-16 

Specific Gravity 

Multipliers to Be Used with Copper Tube When 

Specific Gravity of Gas is other than 0.60. 



Specific 
Gravity 


Multiplier 


Specific 
Gravity 


Multiplier 


.35 


1.31 


1.00 


.78 


.40 


1.23 


1.10 


.74 


.45 


1.16 


1.20 


.71 


.50 


1.10 


1.30 


.68 


.55 


1.04 


1.40 


.66 


.60 


1.00 


1.50 


.63 


.65 


.96 


1.60 


.59 


.70 


.93 


1.70 


.58 


.75 


.90 


1.80 


.56 


.80 


.87 


1.90 


.56 


.85 


.84 


2.00 


.55 


.90 


.82 


2.10 


.54 



Adjustment for a gas with an average specific gravity (relative density) 
other than 0.60 is achieved by multiplying the CFH values of Tables 12- 
15, 12-17, or 12-18 by the appropriate multiplier. 



Table 12-17 

Copper Tube - Medium Pressure 

Maximum Delivery Capacity* of Cubic Feet of Gas 

Per Hour of Copper Tube Carrying Natural Gas of 

0.60** Specific Gravity at Medium Pressure (2.0 psig) 

Based on Pressure Drop of 1.0 psig: 



Table 12-18 

Copper Tube - High Pressure 

Maximum Delivery Capacity* of Cubic Feet of Gas Per 

Hour of Copper Tube Carrying Natural Gas of 0.60** 

Specific Gravity at High Pressure (5.0 psig) Based on 

Pressure Drop of 3.50 psig: 



Length 

of Tube, 

feet 


Outside Diameter of Tube, inches 




Length 

of Tube, 

feet 


Outside Diameter of Tube, inches 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 


3/8 


1/2 


5/8 


3/4 


7/8 


1-1/8 


1-3/8 




(10 mm) 


(15 mm) 


(18 mm) 


(20 mm) 


(22 mm) 


(28 mm) 


(34 mm) 






(10 mm) 


(15 mm) 


(18 mm) 


(20 mm) 


(22 mm) 


(28 mm) 


(34 mm) 


10 


222 


458 


932 


1629 


2,311 


4,937 


8,889 


10 


462 


954 


1,941 


3,392 


4,812 


10,279 


18,504 


20 


153 


315 


641 


1120 


1,589 


3,393 


6,109 




20 


318 


656 


1,334 


2,331 


3,307 


7,064 


12,718 


30 


123 


253 


515 


899 


1,276 


2,725 


4,906 




30 


255 


527 


1,071 


1,872 


2,656 


5,673 


10,213 


40 


105 


216 


440 


770 


1,092 


2,332 


4,199 




40 


218 


451 


917 


1,602 


2,273 


4,855 


8,741 


50 


93 


192 


390 


682 


968 


2,067 


3,721 




50 


194 


399 


812 


1,420 


2,015 


4,303 


7,747 


60 


84 


174 


354 


618 


877 


1,873 


3,372 




60 


175 


362 


736 


1,287 


1,825 


3,899 


7,019 


70 


78 


160 


325 


569 


807 


1,723 


3,102 




70 


161 


333 


677 


1,184 


1,679 


3,587 


6,458 


80 


72 


149 


303 


529 


750 


1,603 


2,886 




80 


150 


310 


630 


1,101 


1,562 


3,337 


6,008 


90 


68 


140 


254 


496 


704 


1,504 


2,708 




90 


141 


291 


591 


1033 


1,466 


3,131 


5,637 


100 


64 


132 


268 


469 


665 


1,421 


2,558 




100 


133 


274 


558 


976 


1,385 


2,958 


5,324 


125 


57 


117 


238 


415 


589 


1,259 


2,267 




125 


118 


243 


495 


865 


1,227 


2,621 


4,719 


150 


51 


106 


215 


376 


534 


1,141 


2,054 




150 


107 


220 


448 


784 


1,112 


2,375 


4,276 


175 


47 


97 


198 


346 


491 


1,050 


1,890 




175 


98 


203 


413 


721 


1,023 


2,185 


3,934 


200 


44 


91 


184 


322 


457 


976 


1,758 




200 


91 


189 


384 


671 


952 


2,033 


3,659 


250 


39 


80 


163 


286 


405 


865 


1,558 




250 


81 


167 


340 


594 


843 


1,802 


3,243 



*Includes 20% factor for fittings. 
**For other pressure drop values see Table 12-16. 



*Includes 20% factor for fittings. 
**For other pressure drop values see Table 12-16. 



180 



FUEL PIPING 



Table 12-19 



Table 12-19 Corragated Stainless Steel Tubing (CSST) 








Gas 


Natural 




Inlet Pressure 


0.5 psi or less 




Pressure Drop 


0.5 in.w.c. 




Specific Gravity 


0.60 













TtibP si7P rFHnr 










Flow 
Designation 


13 


15 


18 


19 


23 


25 


30 


31 


37 


46 


62 


Length 
fee! 








Maximum Caoacitv in 


Cubic Feet of Gas uer Hour 






5 


46 


63 


115 


134 


225 


270 


471 


546 


895 


1.790 


4.142 


10 


32 


44 


82 


95 


161 


192 


330 


383 


639 


1.261 


2.934 


IS 


25 


35 


66 


77 


132 


157 


')(^7 


310 


524 


1 .027 


2,398 


20 


22 


31 


58 


67 


116 


137 


231 


269 


456 


888 


2.078 


25 


19 


27 


52 


60 


104 


122 


206 


240 


409 


793 


1.860 


30 


18 


25 


47 


55 


96 


112 


188 


218 


374 


723 


1.698 


40 


15 


21 


41 


47 


83 


97 


162 


188 


325 


625 


1,472 


50 


13 


19 


37 


42 


75 


87 


144 


168 


292 


559 


1,317 


60 


12 


17 


34 


38 


68 


80 


131 


153 


267 


509 


1,203 


70 


11 


16 


31 


36 


63 


74 


121 


141 


248 


471 


1,114 


80 


10 


15 


29 


33 


60 


69 


113 


132 


232 


440 


1,042 


90 


10 


14 


28 


32 


57 


65 


107 


125 


219 


415 


983 


100 


9 


13 


26 


30 


54 


62 


101 


118 


208 


393 


933 


150 


7 


10 


20 


23 


42 


48 


78 


91 


171 


320 


762 


200 


6 


9 


18 


21 


38 


44 


71 


82 


148 


277 


661 


250 


5 


8 


16 


19 


34 


39 


63 


74 


133 


247 


591 


300 


5 


7 


15 


17 


32 


36 


57 


67 


95 


226 


540 



Note: 

Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased by 

an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft.) of tubing and n is the number of additional fittings 

and /or bends. 

*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic eiiiciency between different tubing sizes. The greater the value 

of EHD, the greater the gas capacity of the tubing. 



181 



Table 12-20 



UNIFORM PLUMBING CODE 



Table 12-20 Corrugated Stainless Steel Tubing (CSST) 








Gas 


Natural 




Inlet Pressure 


0.5 psi or less 




Pressure Drop 


3.0 in. w.c. 




Specific Gravity 


0.60 













TiibP Si7P (FHD)* 










Flow 
Designation 


13 


15 


18 


19 


23 


25 


30 


31 


37 


46 


62 


Length 
feef 


Maximum Cai 


3acity in Cubic Feet 


of Gas per Hour 


5 


120 


160 


277 


327 


529 


649 


1,182 


1,365 


2,141 


4,428 


10,103 


10 


83 


112 


197 


231 


380 


462 


828 


958 


1,528 


3,199 


7,156 


15 


67 


90 


161 


189 


313 


379 


673 


778 


1,254 


2,541 


5,848 


20 


bl 


78 


140 


164 


273 


329 


580 


672 


1,090 


2,197 


5,069 


25 


51 


69 


125 


147 


245 


295 


518 


599 


978 


1,963 


4,536 


30 


46 


63 


115 


134 


225 


270 


471 


546 


895 


1,790 


4,142 


40 


39 


54 


100 


116 


196 


234 


407 


471 


778 


1,548 


3,590 


50 


35 


48 


89 


104 


176 


210 


363 


421 


698 


1,383 


3,213 


60 


32 


44 


82 


95 


161 


192 


330 


383 


639 


1,261 


2,934 


70 


29 


41 


76 


88 


150 


178 


306 


365 


593 


1,166 


2,717 


80 


27 


38 


71 


82 


141 


167 


285 


331 


555 


1,090 


2,543 


90 


26 


36 


67 


77 


133 


157 


268 


311 


524 


1,027 


2,398 


100 


24 


34 


63 


73 


126 


149 


254 


295 


498 


974 


2,276 


150 


19 


27 


52 


60 


104 


122 


206 


240 


409 


793 


1,860 


200 


17 


23 


45 


52 


91 


106 


178 


207 


355 


686 


1,612 


250 


15 


21 


40 


46 


82 


95 


159 


184 


319 


613 


1,442 


300 


13 


19 


37 


42 


75 


87 


144 


168 


234 


559 


1,317 



Note: 

Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased by 

an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings 

and /or bends. 

*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value 

of EHD, the greater the gas capacity of the tubing. 



182 



FUEL PIPING 



Table 12-21 



Table 12-21 Corrugated Stainless Steel Tubing (CSS 


T) 






Gas 


Natural 




Inlet Pressure 


0.5 psi or less 




Pressure Drop 


6.0 in.w.c. 




Specific Gravity 


0.60 















TiihP SiT^P (¥V\n)* 










Flow 
Designation 


13 


15 


18 


19 


23 


25 


30 


31 


37 


46 


62 


Length 
feef 


Maximum Capacity in 


Cubic Feet of Gas per Hour 






5 


173 


229 


389 


461 


737 


911 


1,687 


1,946 


3,000 


6,282 


14,263 


10 


120 


160 


277 


327 


529 


649 


1,182 


1,365 


2,141 


4,428 


10,103 


15 


96 


130 


227 


267 


436 


532 


960 


1,110 


1,758 


3,607 


8,257 


20 


83 


112 


197 


231 


380 


462 


828 


958 


1,528 


3,119 


7,156 


25 


74 


99 


176 


207 


342 


414 


739 


855 


1,371 


2,786 


6,404 


30 


67 


90 


161 


189 


313 


379 


673 


778 


1,254 


2,541 


5,848 


40 


57 


78 


140 


164 


273 


329 


580 


672 


1,090 


2,197 


5,069 


50 


51 


69 


125 


147 


245 


295 


518 


599 


978 


1,963 


4,536 


60 


46 


63 


115 


134 


225 


270 


471 


546 


895 


1,790 


4,142 


70 


42 


58 


106 


124 


209 


250 


435 


505 


830 


1,656 


3,837 


80 


39 


54 


100 


116 


196 


234 


407 


471 


778 


1,548 


3,590 


90 


37 


51 


94 


109 


185 


221 


383 


444 


735 


1,458 


3,386 


100 


35 


48 


89 


104 


176 


210 


363 


421 


698 


1,383 


3,213 


150 


28 


39 


73 


85 


145 


172 


294 


342 


573 


1,126 


2,626 


200 


24 


34 


63 


73 


126 


149 


254 


295 


498 


974 


2,276 


250 


21 


30 


57 


66 


114 


134 


226 


263 


447 


870 


2,036 


300 


19 


27 


52 


60 


104 


122 


206 


240 


409 


793 


1,860 



Note: 

Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased by 

an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings 

and /or bends. 

*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value 

of EHD, the greater the gas capacity of the tubing. 



183 



Table 12-22 



UNIFORM PLUMBING CODE 



Table 12-22 Corrugated Stainless Steel Tubing (CSST) 








Gas 


Natural 




Inlet Pressure 


2.0 psi 




Pressure Drop 


1.0 in.w.c. 




Specific Gravity 


0.60 

















Tube Size (EHD)* 










Flow 
Designatiori 


13 


15 


18 


19 


23 


25 


30 


31 


37 


46 


62 


Length 


Maximiim Cat 


larity in Ciihir Fppt nf Cas npr 


Hour 






in 


270 


353 


587 


700 


1.098 


1 .372 




2.986 


4.509 


9.599 


21637 


25 


166 


220 


374 


444 


709 


876 


1.620 


1.869 


2.887 


6.041 


13.715 


30 


151 


200 


342 


405 


650 


801 


1,475 


1,703 


2,642 


5,509 


12,526 


40 


129 


172 


297 


351 


567 


696 


1,273 


1,470 


2,297 


4,763 


10,855 


50 


115 


154 


266 


314 


510 


624 


1.135 


1,311 


2.061 


4.255 


9.715 


7b 


93 


124 


218 


257 


420 


512 


922 


1.066 


1.692 


3,467 


7.940 


80 


89 


120 


211 


249 


407 


496 


892 


1.031 


1.639 


3.355 


7.689 


100 


79 


107 


189 


222 


366 


445 


795 


920 


1.471 


2.997 


6.881 


150 


64 


87 


155 


182 


302 


364 


646 


748 


1,207 


2,442 


5,624 


200 


55 


75 


135 


157 


263 


317 


557 


645 


1.049 


2.111 


4,874 


250 


49 


67 


121 


141 


236 


284 


497 


576 


941 


1,886 


4,362 


300 


44 


61 


110 


129 


217 


260 


453 


525 


862 


1,720 


3,983 


400 


38 


52 


96 


111 


189 


225 


390 


453 


749 


1,487 


3,452 


500 


34 


46 


86 


100 


170 


202 


348 


404 


552 


1,329 


3,089 



Notes: 

Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased by 

an equivalent length of tubing to the following equation: L = l.Sn, where L is additional length (ft.) of tubing and n is the number of additional fittings 

and /or bends. 

*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value 

of EHD, the greater the gas capacity of the tubing. 



184 



FUEL PIPING 



Table 12-23 



Table 12-23 Corrugated Stainless Steel Tubing (CSST) 






^ 


Gas 


Natural 




Inlet Pressure 


5.0 psi 




Pressure Drop 


3.5 in. w.c. 




Specific Gravity 


0.60 



















Tiibp sizp rFHnr 










Flow 
Designation 


13 


15 


18 


19 


23 


25 


30 


31 


37 


46 


62 


Length 
feet 


Maximum Capacity in Cubic Feet of Gas per Hour 


10 


523 


674 


1,084 


1,304 


1,995 


2,530 


4,923 


5,659 


8,295 


18,080 


40,353 


25 


322 


420 


691 


827 


1,289 


1,616 


3,077 


3,543 


5,311 


11,378 


25,580 


30 


292 


382 


632 


755 


1.181 


1,478 


2,803 


3,228 


4,860 


10,377 


23,361 


40 


251 


329 


549 


654 


1,031 


1,284 


2,418 


2,786 


4,225 


8,972 


20,246 


50 


223 


293 


492 


586 


926 


1,151 


2,157 


2.486 


3,791 


8,015 


18.119 


7b 


180 


238 


403 


479 


763 


944 


1,752 


2,021 


3,112 


6,530 


14,809 


80 


174 


230 


391 


463 


740 


915 


1,694 


1,955 


3,016 


6,320 


14,341 


100 


154 


205 


350 


415 


665 


820 


1,511 


1,744 


2,705 


5,646 


12,834 


150 


124 


166 


287 


339 


548 


672 


1,228 


1,418 


2,221 


4,600 


10,489 


200 


107 


143 


249 


294 


478 


584 


1,060 


1,224 


1,931 


3,977 


9,090 


250 


95 


128 


223 


263 


430 


524 


945 


1,092 


1,732 


3,553 


8,135 


300 


86 


116 


204 


240 


394 


479 


860 


995 


1,585 


3,240 


7,430 


400 


74 


100 


177 


208 


343 


416 


742 


858 


1,378 


2,802 


6,439 


500 


66 


89 


159 


186 


309 


373 


662 


766 


1,035 


2,503 


5,762 



Notes: 

1. Table does not include effect of pressure drop across line regulator. Where regulator loss exceeds 1 psi, do not use this table. Consult with 
regulator manufacturer for pressure drops and capacity factors. Pressure drop across regulator may vary with the flow rate. 

2. CAUTION: Capacities shown in table may exceed maximum capacity of selected regulator. Consult with tubing manufacturer for guidance. 

3. Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends and /or fittings shall be increased by 
an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (ft.) of tubing and n is the number of additional fittings 
and /or bends. 

*EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value 
of EHD, the greater the gas capacity of the tubing. 



185 



UNIFORM PLUMBING CODE 



186 



CHAPTER 13 

HEALTH CARE FACILITIES AND MEDICAL GAS AND VACUUM SYSTEMS 



Part I - Special Requirements for 
Health Care Facilities. 

1301.0 Application. 

1301.1 Construction and equipment requirements 
shall be applied only to new construction and new 
equipment, except as modified in individual 
chapters. Only the altered, renovated, or modernized 
portion of an existing system or individual 
component shall be required to meet the installation 
and equipment requirements stated in this standard. 
If the alteration, renovation, or modernization 
adversely impacts existing performance requirements 
of a system or component, additional upgrading 
shall be required. [NFPA 99 1.3.2] 

1301.2 This chapter applies to the special fixtures 
and systems in health care facilities and to the special 
plumbing requirements for such facilities. Other 
plumbing in such facilities shall comply with other 
applicable sections of the code. 

1302.0 Medical Gas and Vacuum Piping Systems 
- Installation Requirements. 

The installation of medical gas and vacuum piping 
systems shall be in accordance with the requirements 
of this chapter and /or the appropriate standards 
adopted by the Authority Having Jurisdiction. For 
additional standards see Table 14-1. 

1302.1 The installation of individual components 
shall be made in accordance with the instructions of 
the manufacturer. Such instructions shall include 
directions and information deemed by the 
manufacturer to be adequate for attaining proper 
operation, testing, and maintenance of the medical 
gas and vacuum systems. Copies of manufacturer's 
instructions shall be left with the system owner. 
[NFPA 99 5.1.10.6.9.1, 5.1.10.6.9.2, 5.1.10.6.9.3] 

1302.2 The installation of medical gas and vacuum 
systems shall be made by qualified, competent 
technicians who are experienced in making such 
installations. Installers of medical gas and vacuum 
systems shall meet the requirements of ANSI/ASSE 
Standard 6010, Professional Qualification Standard for 
Medical Gas and Vacuum System Installers. [NFPA 99 
5.1.10.6.11.1,5.1.10.6.11.2] 

1302.3 Brazing shall be performed by individuals 
who are qualified under the provisions of 1311.6. 
[NFPA99 5.1.10.6.11.3J 



1302.4 Prior to any installation work, the installer of 
medical gas and vacuum piping shall provide and 
maintain documentation on the job site for the 
qualification of brazing procedures and individual 
brazers that is required under 1311.6. [NFPA 99 
5.1.10.6.11.4] 

1303.0 Protrusions from Walls. 

1303.1 Drinking fountain control valves shall be 
flush-mounted or fully recessed when installed in 
corridors or other areas where patients may be 
transported on a gurney, bed, or wheelchair. 

1303.2 Piping exposed in corridors and other areas 
where subject to physical damage from the 
movement of carts, stretchers, portable equipment, or 
vehicles shall be protected. [NFPA 99 5.1.10.6.2.1] 

1304.0 Psychiatric Patient Rooms. 

Piping and drain traps in psychiatric patient rooms I 
shall be concealed. Fixtures and fittings shall be I 
resistant to vandalism. [NFPA 101] | 

1305.0 Locations for Ice Storage. 

Ice makers or ice storage containers shall be located 
in nursing stations or similarly supervised areas to 
minimize potential contamination. [See NFPA 101] | 

1306.0 Sterilizers. 

1306.1 General. The requirements of this section 
apply to sterilizers and bedpan steamers. Such 
equipment shall be installed in accordance with this 
code and the manufacturer's installation instnictions. 

1306.2 Indirect Waste Connections. 

Waste drainage from sterilizers and bedpan steamers 
shall be connected to the sanitary drainage system 
through an air gap in accordance with this chapter 
and Chapter 8. The size of indirect waste piping shall " 
not be less than the size of the drain connection on | 
the fixture. Each such indirect waste pipe shall not 
exceed fifteen (15) feet (4572 mm) in length and shall 
be separately piped to a receptor. Such receptors 
shall be located in the same room as the equipment 
served. Except for bedpan steamers, such indirect 
waste pipes shall not require traps. A trap having a 
minimum seal of three (3) inches (80 mm) shall be 
provided in the indirect waste pipe for a bedpan 
steamier. 



187 



1307.0-1310.5 



UNIFORM PLUMBING CODE 



1307.0 Vapor Vents and Stacks for Sterilizers. 

1307.1 General. When a sterilizer has provision for 
a vapor vent and such a vent is required by the 
manufacturer, the vent shall be extended to the 
outdoors above the roof. Sterilizer vapor vents shall 
be installed in accordance with the manufacturer's 
instructions and shall not be connected to any 
drainage system vent. 

1308.0 Aspirators. 

1308.1 See Section 603.4.10, Water Inlets to Water 
Supplied Aspirators. Provisions for aspirators or 
other water supplied suction devices shall be 
installed only with the specific approval of the 

I Authority Having Jurisdiction. Where aspirators are 
used for removing body fluids, they shall include a 

► collection container to collect liquids and solid 
particles. Aspirators shall indirectly discharge to the 
sanitary drainage system through an air gap in 
accordance with Chapter 8. The potable water 
supply to an aspirator shall be protected by a 
vacuum breaker or equivalent backflow protection 
device in accordance with Section 603.0. 

Part II — Medical Gas and Vacuum Systems. 

I 1309.0 Application. 

1309.1 The provisions herein shall apply to the 
installation, testing, and verification of medical gas 

^ and vacuum piping in hospitals, clinics, and other 
health care facilities. 

1309.2 The purpose of this chapter is to provide 
requirements for the installation, testing, and 

- verification of medical gas and medical vacuum 
systems, from the central supply system to the 

► station outlets or inlets. 

1309.3 Wherever the terms medical gas or vacuum- 
occur, the provisions shall apply to all piped systems 
for oxygen, nitrous oxide, medical air, carbon 
dioxide, helium, nitrogen, medical-surgical vacuum, 
waste anesthetic gas disposal, and mixtures thereof. 
Wherever the name of a specific gas or vacuum 
service occurs, the provision shall apply only to that 
gas. [NFPA 99 5.1.1.2] 

1309.4 This chapter does not apply to portable 
compressed gas systems. [NFPA 99 4-1.3] 

1 309.5 This chapter does not apply to: 

(A) Cylinder and container management, 
storage, and reserve requirements 

(B) Gas central supply and bulk supply systems 
except as addressed in this chapter 

(C) Electrical connections and requirements 



(D) Motor requirements and controls 

(E) Systems having non-standard operating 
pressures except as addressed in this chapter 

(F) Waste anesthetic gas disposal (WAGD) 
systems 

(G) Surface-mounted medical gas rail systems 

1 309.6 The requirements of this chapter shall not be 
interpreted to conflict with the requirements of 
NFPA 99 Standard for Health Care Facilities. For 
requirements of portions of medical gas and medical 
vacuum systems not addressed in this chapter or 
medical gas and medical vacuum systems beyond 
the scope of this chapter refer to NFPA 99 Standard 
for Health Care Facilities. 

1309.7 An existing system that is not in strict 
compliance with the provisions of the standard 
(Code) shall be permitted to be continued in use as 
long as the Authority Having Jurisdiction has 
determined that such use does not constitute a 
distinct hazard to life. [NFPA 99 4-1.4] (Same as the 
2002 edition of NFPA 99 5.1.1.3) 

1310.0 Definitions. 

1310.1 Building Supply - The pipe from the source 
of supply to a building or structure. 

1310.2 Critical Care Area - Those special care 
units, intensive care units, coronary care units, 
angiography laboratories, cardiac catheterization 
laboratories, delivery rooms, operating rooms, 
postanesthesia recovery rooms, emergency 
departments, and similar areas in which patients are 
intended to be subjected to invasive procedures and 
connected to line-operated, patient-care-related 
electrical appliances. [NFPA 99 3.3.135.2] 

1310.3 General Care Areas - General care areas are 
patient bedrooms, examining rooms, treatment 
rooms, clinics, and similar areas in which it is 
intended that the patient will come in contact with 
ordinary appliances such as a nurses-call system, 
electric beds, examining lamps, telephones, and 
entertainment devices. [NFPA 99 2-2] 

1310.4 Manifold - A device for connecting outlets of 
one or more gas cylinders to the central piping 
system for that specific gas. [NFPA 99 2-2] 

1310.5 Medical Air - For purposes of this standard, 
medical air is air supplied from cylinders, bulk 
containers, medical air compressors, or has been 
reconstituted from oxygen USP and oil-free, dry 
nitrogen NF. Medical air shall be required to have 
the following characteristics: 

(1) Be supplied from cylinders, bulk containers, 
medical air compressor sources, or be 
reconstituted from oxygen USP and oil-free 
dry nitrogen NF 



188 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

(2) Meet the requirements of medical air USP 

(3) Have no detectable liquid hydrocarbons 

(4) Have less than 25 ppm gaseous hydrocarbons 

(5) Have equal to or less than 5 mg/m^ of 
permanent particulates sized 1 micron or 
larger in the air at normal atmospheric 
pressure [NFPA 99 3.3.106, 5.1.3.5.1] 

1310.6 Medical Gas - Gas used in a medical 
facility, including oxygen, nitrous oxide, nitrogen, 
carbon dioxide, helium, medical air, and mixtures 
of these gases. Standards of purity apply. 

I 1310.7 Medical Gas System - Complete system 
consisting of a central supply system (manifold, 
bulk, or compressors), including control equipment 
and piping extending to station outlets at the points 
where medical gases may be required. 

1310.8 Medical Vacuum System - See 1310.19, 
Vacuum System - Level 1 

1310.9 Nitrogen, Oil-Free, Dry (Nitrogen for 
Brazing and Testing) - Nitrogen complying, at a 
minimum, with nitrogen NF. [NFPA 99 2-2] 

1 31 0.1 Patient Care Area - Any portion of a health 
care facility wherein patients are intended to be 
examined or treated. [NFPA 99 2-2] 

1310.11 Purge, Flow - The removal of oxygen from 
a system by oil-free dry nitrogen during brazing. 

1310.12 Purge, System - The removal of nitrogen 
from a system with the medical gas required for that 
system. 

1310.13 SCFM - Standard cubic feet per minute. [NFPA 
993.3.159] 

1310.14 Special Hazard Area - An area such as a 
kitchen or electrical switch-gear room. 

1310.15 Station Inlet - An inlet point in a Type I 
medical-surgical piped vacuum distribution system 
at which the user makes connections and 
disconnections. [NFPA 99 2-2] 

1310.16 Station Outlet - An inlet point in a piped 
medical /surgical vacuum distribution system at 
which the user makes connections and 
disconnections. [NFPA 3.3.167] 

1310.17 Use Point - A room or area of a room, 
where medical gases are dispensed to a single 
patient for medical purposes. A use point is 
permitted to be comprised of a number of station 
outlets of different gases. [NFPA 99 2-2] 

1310.18 User Outlet - See Station Outlet. 

1310.19 Vacuum System - Level 1 - A system 
consisting of central vacuum-producing equipment 
with pressure and operating controls, shutoff valves, 
alarm warning systems, gauges, and a network of 
piping extending to and terminating with suitable 



1310.5-1311.1 

station inlets at locations where patient suction could 
be required. [NFPA 99 2-2] 

1310.20 Valve, Isolation - A valve which isolates 
one piece of equipment from another. 

1310.21 Valve, Riser - A valve at the base of a | 
vertical riser, which isolates that riser. 

1 31 0.22 Valve, Service - A valve serving horizontal | 
piping extending from a riser to a station outlet or 
inlet. 

1310.23 Valve, Source - A single valve at the | 
source which controls a number of units that make 
up the source. 

1310.24 Valve, Zone - A valve which controls the | 
gas or vacuum to a particular area. 

1310.25 Waste Anesthetic Gas Disposal - The 

process of capturing and carrying away gases vented 
from the patient breathing circuit during the normal 
operation of gas anesthesia or analgesia equipment. 
[NFPA 99 3.3.178] 

1311.0 General Requirements. 

1311.1 Oxygen Compatibility - Tubes, valves, 
fittings, station outlets, and other piping components 
in medical gas systems shall have been cleaned for 
oxygen service by the manufacturer prior to 
installation in accordance with CGA 4.1, Cleaning 
Equipment for Oxygen Service, except that fittings shall 
be permitted to be cleaned by a supplier or agency 
other than the manufacturer. [NFPA 99 5.1.10.1.1] 

1311.1.1 Components include but are not 
limited to containers, valves, valve seats, 
lubricants, fittings, gaskets, and interconnecting 
equipment including hose. Easily ignitable 
materials should be avoided. 

Compatibility involves both combustibility 
and ease of ignition. Materials that burn in air 
will burn violently in pure oxygen at normal 
pressure and explosively in pressurized oxygen. 
Also, many materials that do not burn in air will 
do so in pure oxygen, particularly under 
pressure. Metals for containers and piping have 
to be carefully selected, depending on service 
conditions. The various steels are acceptable for 
many applications, but some service conditions 
can call for other materials (usually copper or its 
alloys) because of their greater resistance to 
ignition and lower rate of combustion. 
Similarly, materials that can be ignited in air 
have lower ignition energies in oxygen. Many 
such materials can be ignited by friction at a 
valve seat or stem packing or by adiabatic 
compression produced when oxygen at high 



189 



1311.1 -1312.1 



UNIFORM PLUMBING CODE 



pressure is rapidly introduced into a system 
initially at low pressure. 

1311.1.2 Materials used in central supply 
systems shall meet the following requirement: 

In those portions of systems intended to 
handle oxygen or nitrous oxide at gauge 
pressures of less than 2070 kPa (300 psi), 
material construction shall be compatible with 
oxygen under the temperatures and pressures to 
which the components can be exposed in the 
containment and use of oxygen, nitrous oxide, 
m.ixtures of these gases, or mixtures containing 
more than 23.5 percent oxygen. [NFPA 99 
5.1.3.4.3 (2)] 

1311.2 Certification of medical gas and medical 
vacuum systems shall conform to the requirements 
of Section 1331.0 of this code, the Authority Having 
Jurisdiction, and NFPA 99 Standard for Health Care 
Facilities section 5.1.12. [NFPA 5.1.12]. 

1 31 1 .3 Prior to any installation work, the installer of 
medical gas and vacuum piping shall provide and 
maintain documentation on the job site for the 
qualification of brazing procedures and individual 
brazers that is required under 1311.6. [NFPA 99 
5.1.10.6.11.4] 

1311.3.1 Each length of tube shall be delivered 
plugged or capped by the manufacturer and 
kept sealed until prepared for installation. 
Fittings, valves, and other components shall be 
delivered sealed, labeled, and kept sealed until 
prepared for installation. [NFPA 99 5.1.10.1.2 
and 5.1.10.1.3] 

1 31 1 .4 All medical gas and medical vacuum systems 
shall be supplied from a source consisting of at least 
two units - primary and secondary, e.g., a manifold 
consisting of two cylinder banks with at least two 
cylinders in each bank, minimum of two air 
compressors, or minimum of two vacuum pumps. 
However, two supply pipelines are not required. 

1311.5 Health Care Organization personnel shall be 
permitted to install piping systems if all the 
requirements of this chapter are met during 
installation. [NFPA 99 4-3.1. 2.10(b)] 

1 31 1 .6 Brazing procedures and brazer performance 
for the installation of medical gas and vacuum 
piping shall be qualified in accordance with either 
Section IX, Welding and Brazing Qualifications, of the 
ASME Boiler and Pressure Vessel Code, or AWS 
B2.2, Standard for Brazing Procedure and Performance 
Qualifications, both as modified below. [NFPA 
5.1.10.6.12.1] 

1311.6.1 Brazers shall be qualified by visual 
examination of the test coupon followed by 
sectioning. [NFPA 5.1.10.6.12.2] 



1311.6.2 The Brazing Procedure Specification 
(BPS) shall address cleaning, joint clearance, 
overlap, internal purge gas purge gas flow rate, 
and filler metal. [NFPA 99 4-3.1. 2.12(b)] 

1311.6.3 The brazing procedure specification 
and the record of brazer performance 
qualification shall document filler metal used, 
cleaning, joint clearance, overlap, internal 
purge gas and flow rate during brazing of 
coupon, and the absence of internal oxidation 
in the completed coupon. [NFPA 5.1.10.6.12.4] 

1311.6.4 Brazing procedures qualified by a 
technically competent group or agency shall be 
permitted under the following conditions: 

(1) The brazing procedure specification and 
the procedure qualification record 
meets the requirements of this standard. 

(2) The employer obtains a copy of both the 
brazing procedure specification and the 
supporting qualification records from 
the group or agency and signs and dates 
these records, thereby accepting 
responsibility for the qualifications that 
were performed by the group or agency. 

(3) The employer qualifies at least one 
brazer following each brazing procedure 
specification used. [NFPA 5.1.10.6.12.5] 

1311.6.5 An employer shall be permitted to 
accept brazer qualification records of a previous 
employer under the following conditions: 

(1) The brazer has been qualified following 
the same or an equivalent procedure 
that the new employer uses. 

(2) The new employer obtains a copy of the 
record of brazer performance 
qualification tests from the previous 
employer and signs and dates these 
records, thereby accepting responsibility 
for the qualifications performed by the 
previous employer. [NFPA 99 5.1.10.6.12.6] 

1311.6.6 Performance qualifications of brazers 
shall remain in effect indefinitely unless the 
brazer does not braze with the qualified 
procedure for a period exceeding 6 months, or 
there is a specific reason to question the ability 
of the brazer." [NFPA 99 5.1.10.6.12.7] 

1312.0 Plan Review. 

1312.1 Before any medical gas or medical vacuum 
system is installed or altered in any hospital, medical 
facility, or clinic, duplicate plans and specifications 
shall be filed with the Authority Having Jurisdiction, | 
Approval of the plans shall be obtained prior to 



190 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

issuance of any permit by the Authority Having 
Jurisdiction. 

1312.2 Plans and specifications shall show the 
following, in detail: 

1312.2.1 Plot plan of the site, drawn to scale, 
indicating the location of existing or new 
cylinder storage areas, property lines, 
driveways, and existing or proposed buildings. 

1312.2.2 Piping layout of the proposed piping 
system or alteration, including alarms, valves, 
origin of gases, and user outlets /inlets. The 
demand and loading of any piping, existing or 
future, shall also be indicated. 

1312.2.3 Complete specification of materials. 

1312.3 Plans and specifications submitted to the 
I Authority Having Jurisdiction shall clearly indicate 

the nature and extent of the work proposed and shall 
show in detail that such work will conform to the 
provisions of this code. 

1312.4 A record of as-built plans and valve 
identification records shall remain on the site at 
all times. 

1313.0 System Performance. 

1313.1 Required Operating Pressures. All medical 
gas and medical vacuum systems shall be capable of 
delivering service in the pressure ranges listed in Table 
13-1. [NFPA 99 Table 5.1.11] 

1313.2 l\/linlmum Flow Rates. All medical gas and 
medical vacuum systems shall be capable of 
supplying the flow rates listed in Table 13-2. 

1313.3 IVIinimum Station Outlets/Inlets. Station 
outlets and inlets for medical gas and medical vacuum 
systems shall be provided as listed in Table 13-3. 



— ► 1314.0 (Reserved) 

1315.0 Required Pipe Sizing. 

1315.1 Where the maximum demand for each 
medical gas or vacuum system and the maximum 
length of piping between the source equipment and 
the most distant station outlet /inlet do not exceed 
the values in Table 13-6, the size of pipe of each 
section of the system shall be determined using 
Tables 13-4 and 13-6. The size for systems beyond 
the range of Table 13-6 shall be determined by using 
the methods set forth in Section 1315.3 of this 
chapter. 

1 31 5.2 To determine the size of each section of pipe 
in any system within the range of Table 13-6, 
proceed as follows: 



1312.1 -1316.3 

1315.2.1 Measure the length of the pipe from 
the source equipment location to the most 
remote station inlet /outlet on the system. 

1315.2.2 In Table 13-6, select the column 
showing that distance, or the next longer 
distance if the table does not give the exact 
length. 

1315.2.3 Starting at the most remote outlet /inlet, 
find in the vertical column just selected, the 
medical gas or vacuum demand for that 
inlet /outlet. If the exact figure of demand is not 
shown, choose the next larger figure below in the 
column. 

1315.2.4 Opposite this demand figure, in the 
first column at the left in Table 13-6 will be 
found the correct size of pipe. 

1315.2.5 Using this same vertical column, 
proceed in a similar manner for each section of 
pipe serving this inlet /outlet. For each section of 
pipe, determine the total gas or vacuum demand 
supplied by the section, using Table 13-4. 

1 31 5.2.6 Size each section of branch piping not 
previously sized by measuring the distance from 
the source equipment location to the most 
remote inlet /outlet in that branch, and follow 
the procedures of Sections 1315.2.2, 1315.2.3, 
1315.2.4, and 1315.2.5. 

Note: 

Size branch piping in the order of the distance from 
the source location, beginning with the most distant 
outlet not previously sized. 

1315.3 For conditions other than those covered by 
Section 1315.1 of this section, such as longer runs of 
greater gas or vacuum demands, the size of each gas 
or vacuum piping system shall be determined by 
standard engineering methods acceptable to the 
Authority Having Jurisdiction, and each system shall I 
be so designed that the total pressure drop or gain 
between the source equipment and any inlet /outlet 
will not exceed the allowable pressures shown in 
Table 13-1. 

1316.0 Workmanship. 

1316.1 All design, construction, and workmanship 
shall be in conformity with accepted engineering 
practices and shall meet the requirements of this code. 

1316.2 Cracks, holes, or other imperfections in 
materials shall not be concealed by welding, brazing, 
or soldering, or by using paint, wax, tar, or other 
leak-sealing or repair agents. 

1316.3 Burred ends of all tubing shall be deburred 
using a deburring tool to the full bore of the tube, 
and all chips shall be removed. 



191 



1317.0-1317.6 



UNIFORM PLUMBING CODE 



1317.0 Materials. The provisions of this section 
apply to the field-installed piping for the distribution 
of medical piped gases. [NFPA 4-3.1.2.7] 

1317.1 Tubes, valves, fittings, station outlets, and 
other piping components in medical gas systems 
shall have been cleaned for oxygen service by the 
manufacturer prior to installation in accordance 
with CGA 4.1, Cleaning Equipment for Oxygen Service, 
except that fittings shall be permitted to be cleaned 
by a supplier or agency other than the 
manufacturer. [NFPA 99: 5.1.10.1.1] 

1317.2 Each length of tube shall be delivered 
plugged or capped by the manufacturer and kept 
sealed until prepared for installation. Fittings, 
valves, and other components shall be delivered 
sealed, labeled, and kept sealed until prepared for 
installation. [NFPA 99: 5.1.10.1.2, 5.1.10.1.3] 

1317.3 Tubes shall be hard-drawn seamless copper 
ASTM B 819 medical gas tube. Type L, except that 
where operating pressures are above a gauge 
pressure of 1275 kPa (185 psi). Type K shall be used 
for sizes larger than DN80 (NPS 3) (3-1/8 in. CD.). 

ASTM B 819 medical gas tube shall be identified 
by the manufacturer's markings "OXY," "MED," 
"OXY/MED," "OXY/ACR," or "ACR/MED" in blue 
(Type L) or green (Type K). 

Vacuum tubes shall be hard-drawn seamless 
copper, either ASTM B 819 medical gas tube, ASTM 
B 88 water tube (Type K, L, or M), or ASTM B 280 
ACR tube. 

Piping systems shall be designed and sized to 
deliver the required flow rates at the utilization 
pressures. 

Mains and branches in medical gas-piping 
systems shall be not less than DN15 (NPS 1/2) (5/8 
in. CD.) size. 

Mains and branches in medical-surgical vacuum 
systems shall be not less than DN20 (NPS 3/4) (7/8 
in. CD.) size. 

Drops to individual station outlets and inlets 
shall be not less than DN15 (NPS 1/2) (5/8 in. CD.) 



size. 



Runouts to alarm panels and connecting tubing 
for gauges and alarm devices shall be permitted to 
be DN8 (NPS 1/4) (3/8 in. CD.) size. [NFPA 99 
5.1.10.1.4, 5.1.10.1.5, 5.1.10.2.1, 5.1.10.6] 

1317.3.1 For systems operated at pressures 
between 200 and 300 psig (1380 and 2070 kPa, 
respectively) ASTM B819, Type K copper shall 
be used. [NFPA 99 4-3.1.2.7(c)] 

1317.4 Turns, offsets, and other changes in direction 
in medical gas and vacuum piping shall be made 
with brazed wrought-copper capillary fittings 



complying with ANSI B16.22, Wrought Copper and 
Copper Alloy Solder-Joint Fittings; or brazed fittings 
complying with MSS SP-73, Brazed Joints for Wrought 
and Cast Copper Alloy Solder Joint Pressure Fittings; or 
for vacuum only, fittings as permitted as follows: 

(A) Couplings and fittings rated by the 
coupling /fitting manufacturer for full 
vacuum service and having n\echanically 
pressed joints that include a resilient O-ring 
seal that is rated for use with anesthetizing 
agents. 

(B) Grooved joints rated by the coupling /fitting 
manufacturer for full vacuum service 
consisting of roll-grooved tube ends and 
mechanical-joint couplings that include 
resilient gaskets rated for use with 
anesthetizing agents. 

(C) Copper tube shall not be joined by roll- 
grooving if less than DN50 (NPS 2 in.) pipe 



size. 



(D) Mechanically pressed joints and grooved 
joints shall be made using the coupling /fitting 
manufacturer's recommended procedure. 

1317.4.1 Cast-copper alloy fittings shall not be 
permitted. 

1317.4.2 Branch connections in vacuum piping 
systems shall be permitted to be made using 
mechanically formed, drilled, and extruded tee- 
branch connections that are formed in accordance 
with the tool manufacturer's instructions, and 
brazed. [NFPA 5.1.10.3.1, 5.1.10.3.2, 5.1.10.3.3, 
5.1.10.5.8 (4)-(7)] 

1317.5 RESERVED 

1317.6 The following special fittings shall be 
permitted to be used in lieu of brazed joints: 

(1) Memory-metal couplings having temperature 
and pressure ratings joints not less than that 
of a brazed joint. 

(2) Listed or approved metallic gas tube fittings 
that, when made up, provide a permanent 
joint having the mechanical, thermal, and 
sealing integrity of a brazed joint. 

(3) Dielectric fittings where required by the 
manufacturer of special medical equipment 
to electrically isolate the equipment from the 
piping distribution system. 

(4) Couplings and fittings rated by the 
coupling /fitting manufacturer for full 
vacuum service and having mechanically 
pressed joints that include a resilient O-ring 



192 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

seal that is rated for use with anesthetizing 
agents. 

(5) Grooved joints rated by the coupling /fitting 
manufacturer for full vacuum service 
consisting of roll-grooved tube ends and 
mechanical-joint couplings that include 
resilient gaskets rated for use with 
anesthetizing agents. 

(6) Copper tube shall not be joined by roll- 
grooving if less than DN50 (NPS 2 in.) pipe 
size. 

(7) Mechanically pressed joints and grooved 
joints shall be made using the coupling /fitting 
manufacturer's recommended procedure. 

1317.7 The following joints shall be prohibited 
throughout medical gas and vacuum distribution 
pipeline systems: 

(1) Flared and compression- type connections, 
including connections to station outlets and 
inlets, alarm devices, and other components. 

(2) Other straight-threaded connections, 
including unions. 

1317.7.1 Threaded joints in medical gas and 
vacuum distribution piping shall meet the 
following requirements: 

(1) Be limited to connections to pressure/ 
vacuum indicators, alarm devices, and 
source equipment. 

(2) Be tapered pipe threads complying with 
ANSI Bl.20.1, Pipe Threads, General 
Purpose. 

(3) Be made up with polytetrafluoroethylene 
(such as Teflon^'^) tape or other thread 
sealant recommended for oxygen 
service, with the sealant applied to the 
male threads only. [NFPA 99 5.1.10.5.8, 
5.1.10.5.9 and 5.1.10.4] 

1317.8 New or replacement shutoff valves shall be 
as follows: 

(1) Quarter turn, full ported ball type 

(2) Brass or bronze construction 

(3) Have extensions for brazing 

(4) Have a handle indicating open or closed 

(5) Consist of three pieces permitting inline 
serviceability [NFPA 99 5.1.4.3] 

1 31 7.9 Tubes shall be hard-drawn seamless copper 
ASTM B 819 medical gas tube. Type L, except that 
where operating pressures are above a gauge 
pressure of 1275 kPa (185 psi) Type K shall be used 
for sizes larger than DN80 (NPS 3) (3-1/8 in. O.D.). 
[NFPA 5.1.10.1.4] 



1317.6-1317.11 

1317.10 Vacuum tubes shall be hard-drawn 
seamless copper, either ASTM B 819 medical gas 
tube, ASTM B 88 water tube (Type K, L, or M), or 
ASTM B 280 ACR tube. Threaded joints in medical 
gas and vacuum distribution piping shall meet the 
following requirements: 

(1) Be limited to connections to pressure/ 
vacuum indicators, alarm devices, and 
source equipment 

(2) Be tapered pipe threads complying with 
ANSI Bl.20.1, Pipe Threads, General Purpose 

(3) Be made up with polytetrafluoroethylene 
(such as Teflon™) tape or other thread 
sealant recommended for oxygen service, 
with the sealant applied to the male threads 
only. 

Soldered joints in copper Level 3 vacuum and Level 
3 gas-powered systems piping shall be made in 
accordance with ASTM B 828, Making Capillary Joints 
by Soldering of Copper and Copper Alloy Tube and 
Fittings, using a lead-free solder filler metal 
containing not more than 0.2 percent lead by 
volume. [NFPA 5.1.10.2.1, 5.1.10.4, and 5.3.10.5] 

1317.10.1 Piping systems shall be designed and 
sized to deliver the required flow rates at the 
utilization pressures. 

Mains and branches in medical gas piping 
systems shall be not less than DN15 (NPS 1/2) 
(5/8 in. O.D.) size. 

Mains and branches in medical-surgical 
vacuum systems shall be not less than DN20 
(NPS 3/4) (7/8 in. O.D.) size. 

Drops to individual station outlets and inlets 
shall be not less than DN15 (NPS 1/2) (5/8 in. 
O.D.) size. 

Runouts to alarm panels and connecting 
tubing for gauges and alarm devices shall be 
permitted to be DNS (NPS 1/4) (3/8 in. O.D.) 
size. [NFPA 5.1.10.6 and its subsections.] 

1317.11 Turns, offsets, and other changes in direction 
in medical gas and vacuum piping shall be made with 
brazed wrought copper capillary fittings complying 
with ANSI B16.22, Wrought Copper and Copper Alloy 
Solder-Joint Fittings; or brazed fittings complying with 
MSS SP-73, Brazed Joints for Wrought and Cast Copper 
Alloy Solder Joint Pressure Fittings; or for vacuum only 
fittings, as permitted as shown below: 

(1) Couplings and fittings rated by the 
coupling /fitting manufacturer for full 
vacuum service and having mechanically 
pressed joints that include a resilient O- 
ring seal that is rated for use with 
anesthetizing agents. 



193 



1317.11 -1319.2 



UNIFORM PLUMBING CODE 



(2) Grooved joints rated by the coupling /fitting 
manufacturer for full vacuum service 
consisting of roll-grooved tube ends and 
mechanical-joint couplings that include 
resilient gaskets rated for use with 
anesthetizing agents. 

(3) Copper tube shall not be joined by roll- 
grooving if less than DN50 (NFS 2 in.) pipe 
size. 

(4) Mechanically pressed joints and grooved 
joints shall be made using the coupling/ 
fitting manufacturer's recommended 
procedure. [NFPA 99 5.1.10.5.8 (4)-(7)] 
Cast-copper alloy fittings shall not be 
permitted. 

Turns, offsets, and other changes in direction in 
medical gas piping, copper Level 3 vacuum piping, 
and piping for gas-powered devices shall be made 
with brazed wrought-copper capillary fittings 
complying with ANSI B16.22, Wrought Copper and 
Copper Alloy Solder-Joint Fittings, or brazing fittings 
complying with MSS SP-73, Brazed Joints for Wrought 
and Cast Copper Alloy Solder Joint Pressure Fittings. 

Cast-copper alloy fittings shall not be used 
where joints are brazed. 

Branch connections in copper vacuum piping 
systems shall be permitted to be made using 
mechanically formed, drilled, and extruded tee- 
branch connections that are formed in accordance 
with the tool manufacturer's instructions, and 
brazed. [NFPA 99 5.1.10.3.1, 5.3.10.3.1, and 5.3.10.3.3] 

The following joints shall be prohibited 
throughout medical gas and vacuum distribution 
pipeline systenis: 

(1) Flared and compression- type connections, 
including connections to station outlets and 
inlets, alarm devices, and other components 

(2) Other straight-threaded connections, 
including unions [NFPA 99 5.1.10.5.9] 

New or replacement shutoff valves shall be as 
follows: 

(1) Quarter turn, full ported, ball type 

(2) Brass or bronze construction 

(3) Have extensions for brazing 

(4) Have a handle indicating open or closed 

(5) Consist of three pieces permitting inline 
serviceability [NFPA 99 5.1.4.3] 

1318.0 Cleaning for Medical Gas Piping Systems. 

1318.1 Tubes, valves, fittings, station outlets, and 
other piping components in medical gas systems 
shall have been cleaned for oxygen service by the 



manufacturer prior to installation in accordance with 
CGA 4.1, Cleaning Equipment for Oxygen Service, 
except that fittings shall be permitted to be cleaned 
by a supplier or agency other than the manufacturer. 
[NFPA 99 5.1.10.1.1] 

1318.2 The interior surfaces of tube ends, fittings, 
and other components that were cleaned for oxygen 
service by the manufacturer, but become 
contaminated prior to being installed, shall be 
permitted to be recleaned on-site by the installer by 
thoroughly scrubbing the interior surfaces with a 
clean, hot water-alkaline solution, such as sodium 
carbonate or trisodium phosphate 450 g to 11 L (1 lb 
to 3 gal) of potable water and thoroughly rinsing 
them with clean, hot potable water. 
Other aqueous cleaning solutions shall be permitted 
to be used for on-site recleaning permitted above, 
provided that they are as recommended in CGA 
Pamphlet G-4.1, Cleaning Equipment for Oxygen 
Service, and are listed in CGA Pamphlet 02-DIR, 
Directory of Cleaning Agents for Oxygen Service. [NFPA 
99 5.1.10.5.3.10 and 5.1.10.5.3.11] 

1318.3 Material that has become contaminated 
internally and is not clean for oxygen service shall 
not be installed. [NFPA 99 5.1.10.5.3.12] 

1319.0 Installation of Piping. 

1319.1 Piping shall be protected against freezing, 
corrosion, and physical damage. 

Piping exposed in corridors and other areas 
where subject to physical damage from the 
movement of carts, stretchers, portable equipment, 
or vehicles shall be protected. 

Piping underground within buildings or 
enibedded in concrete floors or walls shall be 
installed in a continuous conduit. [NFPA 99 
5.1.10.6.2] 

1319.2 Piping risers shall be permitted to be 
installed in pipe shafts if protected from physical 
damage, effects of excessive heat, corrosion, or 
contact with oil. 

Piping shall not be installed in kitchens, 
electrical switchgear rooms, elevator shafts, and 
areas with open flames. 

Medical gas piping shall be permitted to be 
installed in the same service trench or tunnel with 
fuel gas lines, fuel oil lines, electrical lines, steam 
lines, and similar utilities provided that the space is 
ventilated (naturally or mechanically) and the 
ambient temperature around the medical gas piping 
is limited to 54°C (130°F) maximum. 

Medical gas piping shall not be located where 
subject to contact with oil, including a possible 



194 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

flooding area in the case of a major oil leak. [NFPA 
99 5.1.10.6.3] 

1 31 9.3 Buried piping outside of buildings shall be 
installed below the local level of frost penetration. 

1319.4 Underground piping shall be installed in a 
continuous enclosure to protect the pipe during 
backfilling. 

The continuous enclosure shall be split or 
otherwise provide access at the joints during visual 
inspection and leak testing. 

Buried piping that will be subject to surface 
loads shall be buried at a depth that will protect the 
piping and its enclosure from excessive stresses. 

The minimum backfilled cover above the top of 
the enclosure for buried piping outside of buildings 
shall be 900 mm (36 in.), except that the minimum 
cover shall be permitted to be reduced to 450 mm (18 
in.) where physical damage is otherwise prevented. 

Trenches shall be excavated so that the pipe 
enclosure has firm, substantially continuous bearing 
on the bottom of the trench. 

Backfill shall be clean and compacted so as to 
protect and uniformly support the pipe enclosure. 

A continuous tape or marker placed immediately 
above the enclosure shall clearly identify the pipeline 
by specific name. 

A continuous warning means shall also be 
provided above the pipeline at approximately one- 
half the depth of bury. 

Where underground piping is installed through 
a wall sleeve, the ends of the sleeve shall be sealed to 
prevent the entrance of groundwater into the 
building. [NFPA 99 5.1.10.6.5] 

1319.5 RESERVED 

1319.6 RESERVED 

131 9.7 RESERVED 

1319.8 Hose and flexible connectors, both metallic 
and non-metallic, shall be no longer than necessary 
and shall not penetrate or be concealed in walls, 
floors, ceilings, or partitions. Flexible connectors, 
metallic or non-metallic, shall have a minimum burst 
pressure, with a gauge pressure of 6895 kPa (1000 
psi). [NFPA 99 5.1.10.6.7] 

1 31 9.9 Where a positive pressure medical gas-piping 
distribution system originally used or constructed 
for the use at one pressure and for one gas is 
converted for operation at another pressure or for 
another gas, all provisions of NFPA 5.1.10 shall 
apply as if the system were new. 

A vacuum system shall not be permitted to be 
converted for use as a gas system. [NFPA 99 
5.1.10.6.10] 



1319.2-1320.1 

1319.10 Piping exposed in corridors and other areas 
where subject to physical damage from the 
movement of carts, stretchers, portable equipment, or 
vehicles shall be protected. 

1319.11 Piping shall be supported from the 
building structure in accordance with MSS Standard 
Practice SP-69, Piping Hangers and Supports - Selection 
and Application. 

Hangers and supports shall comply with MSS 
Standard Practice SP-58, Pipe Hangers and Supports - 
Materials, Design, and Manufacture. 

Hangers for copper tube shall have a copper 
finish and be sized for copper tube. 

In potentially damp locations, copper tube hangers 
or supports that are in contact with the tube shall be 
plastic-coated or otherwise be insulated from the tube. 

Maximum support spacing shall be in 
accordance with Table 13-7 [NFPA Table 5.1.10.6.4.5] 

1319.12 Where required, medical gas and vacuum 
piping shall be seismically restrained against 
earthquakes in accordance with the applicable 
building code. [NFPA 99 5.1.10.6.4.6] Seismic 
considerations shall conform to the requirements of 
this code and the Authority Having Jurisdiction. 

1319.13 Two or more medical gas-piping systems 
shall not be intercormected for testing or any other 
reason. Leak testing shall be accomplished by 
separately charging and testing the individual piping 
system. [NFPA 99 4-3.1. 2.10(d)] 

1319.14 Piping shall be labeled by stenciling or 
adhesive markers that identify the medical gas or 
vacuum system. [NFPA 5.1.11.1.1] 

Pipe labels shall show the name of the 
gas /vacuum system or the chemical symbol. [NFPA 
99 5.1.11.1.2] 

1320.0 Joints. This section sets forth the 
requirements for pipe joint installation for positive 
pressure medical gas systems. 

1320.1 Threaded joints in medical gas and vacuum 
distribution piping shall meet the following 
requirements: 

(1) Be limited to connections to pressure/ 
vacuum indicators, alarm devices, and 
source equipment 

(2) Be tapered pipe threads complying with 
ANSI Bl.20.1, Pipe Threads, General Purpose 

(3) Be made up with polytetrafluoroethylene 
(such as Teflon™) tape or other thread 
sealant recommended for oxygen service, 
with the sealant applied to the male 
threads only 



195 



1320.1 -1320.4 



UNIFORM PLUMBING CODE 



Brazed joints shall be made using a brazing alloy 
that exhibits a melting temperature in excess of 
538°C (1000°F) to retain the integrity of the piping 
system in the event of fire exposure. [NFPA 99 
5.1.10.5.1.1] 

Brazed tube joints shall be the socket type. 
[NFPA 99 5.1.10.5.1.2] 

Filler metals shall bond with and be 
metallurgically compatible with the base metals 
being joined. [NFPA 99 5.1.10.5.1.3] 

Filler metals shall comply with ANSI/AWS 
A.5.8, Specification for Brazing Filler Metal. [NFPA 99 
5.1.10.5.1.4] 

Copper-to-copper joints shall be brazed using a 
copper-phosphorus or copper-phosphorus-silver 
brazing filler metal (BCuP series) without flux. 
[NFPA 99 5.1.10.5.1.5] 

Flux shall only be used when brazing dissimilar 
metals, such as copper and bronze or brass, using a 
silver (BAg series) brazing filler material. [NFPA 99 
5.1.10.5.4.1] 

Joints to be brazed in place shall be accessible for 
necessary preparation, assembly, heating, filler 
application, cooling, cleaning, and inspection. [NFPA 
99 5.1.10.5.1.6] 

1320.2 Tube ends shall be cut square using a sharp 
tubing cutter to avoid deforming the tube. [NFPA 99 
5.1.10.5.2.1] 

The cutting wheels on tubing cutters shall be 
free from grease, oil, or other lubricant not suitable 
for oxygen service. [NFPA 99 5.1.10.5.2.2] 

The cut ends of the tube shall be deburred with a 
sharp, clean deburring tool, taking care to prevent 
chips from entering the tube. [NFPA 99 5.1.10.5.2.3] 

1320.3 The interior surfaces of tubes, fittings, and 
other components that are cleaned for oxygen service 
shall be stored and handled to avoid contamination 
prior to assembly and brazing. [NFPA 99 5.1.10.5.3.1] 

The exterior surfaces of tube ends shall be 
cleaned prior to brazing to remove any surface 
oxides. [NFPA 99 5.1.10.5.3.2] 

When cleaning the exterior surfaces of tube 
ends, no matter shall be permitted to enter the tube. 
[NFPA 99 5.1.10.5.3.3] 

If the interior surfaces of fitting sockets become 
contaminated prior to brazing, they shall be 
recleaned for oxygen in accordance with NFPA 99 
5.1.10.5.3.10 and be cleaned for brazing with a clean, 
oil-free wire brush. [NFPA 99 5.1.10.5.3.4] 

Non-abrasive pads shall be used to clean the 
exterior surfaces of tube ends. [NFPA 99 5.1.10.5.3.5] 

The use of steel wool or sand cloth shall be 
prohibited. [NFPA 99 5.1.10.5.3.6] 



The cleaning process shall not result in grooving 
of the surfaces to be joined. [NFPA 99 5.1.10.5.3.7] 

After being abraded, the surfaces shall be wiped 
using a clean, lint-free white cloth. [NFPA 99 
5.1.10.5.3.8] 

Tubes, fittings, valves, and other components 
shall be visually examined internally before being 
joined to verify that they have not become 
contaminated for oxygen service and that they are free 
of obstructions or debris. [NFPA 99 5.1.10.5.3.9] 

The interior surfaces of tube ends, fittings, and 
other components that were cleaned for oxygen 
service by the manufacturer, but become 
contaminated prior to being installed, shall be 
permitted to be recleaned on-site by the installer by 
thoroughly scrubbing the interior surfaces with a 
clean, hot water-alkaline solution, such as sodium 
carbonate or trisodium phosphate 450 g to 11 L (1 lb 
to 3 gal) of potable water and thoroughly rinsing 
them with clean, hot potable water. [NFPA 99 
5.1.10.5.3.10] 

Other aqueous cleaning solutions shall be 
permitted to be used for on-site recleaning permitted 
in 5.1.10.5.3.10 provided that they are as 
recommended in CGA Pamphlet G-4.1, Cleaning 
Equipment for Oxygen Service, and are listed in CGA 
Pamphlet 02-DIR, Directory of Cleaning Agents for 
Oxygen Service. [NFPA 99 5.1.10.5.3.11] 

Material that has become contaminated 
internally and is not clean for oxygen service shall 
not be installed. [NFPA 99 5.1.10.5.3.12] 

Joints shall be brazed within one hour after the 
surfaces are cleaned for brazing. [NFPA 99 
5.1.10.5.3.13] 

1320.4 Flux shall only be used when brazing 
dissimilar metals such as copper and bronze or brass, 
using a silver (BAg series) brazing filler metal. 
[NFPA 99 5.1.10.5.4.1] 

Surfaces shall be cleaned for brazing in 
accordance with 1320.3. [NFPA 99 5.1.10.5.4.2] 

Flux shall be applied sparingly to minimize 
contamination of the inside of the tube with flux. 
[NFPA 99 5.1.10.5.4.3] 

The flux shall be applied and worked over the 
cleaned surfaces to be brazed using a stiff bristle 
brush to ensure complete coverage and wetting of 
the surfaces with flux. [NFPA 99 5.1.10.5.4.4] 

Where possible, short sections of copper tube 
shall be brazed onto the non-copper component and 
the interior of the subassembly shall be cleaned of 
flux prior to installation in the piping system. [NFPA 
99 5.1.10.5.4.5] 

On joints DN20 (NFS 3/4) (7/8 in. O.D.) size 



196 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

and smaller, flux-coated brazing rods shall be 
permitted to be used in lieu of applying flux to the 
surfaces being joined. [NFPA 99 5.1.10.5.4.6] 

1320.5 Tube ends shall be inserted fully into the 
socket of the fitting. [NFPA 99 5.1.10.5.6.1] 

Where flux is permitted, the joint shall be heated 
slowly until the flux has liquefied. [NFPA 99 
5.1.10.5.6.2] 

After flux is liquefied, or where flux is not 
permitted to be used, the joint shall be heated quickly 
to the brazing temperature, taking care not to overheat 
the joint. [NFPA 99 5.1.10.5.6.3] 

Techniques for heating the joint; applying the 
brazing filler metal, and making horizontal, 
vertical, and large-diameter joints shall be as stated 
in sections on Applying Heat and Brazing and 
Horizontal and Vertical Joints in Chapter VII, 
Brazed Joints, in the CDA Copper Tube Handbook. 
[NFPA 99 5.1.10.5.6.4] 

1320.6 While being brazed, joints shall be 
continuously purged with oil-free, dry nitrogen NF 
to prevent the formation of copper oxide on the 
inside surfaces of the joint. [NFPA 99 5.1.10.5.5.1] 

The source of the purge gas shall be monitored, 
and the installer shall be audibly alerted when the 
source content is low. [NFPA 99 5.1.10.5.5.2] 

The purge gas flow rate shall not produce a 
positive pressure in the piping system. [NFPA 99 
5.1.10.5.5.3] 

The purge gas flow rate shall be controlled by 
the use of a pressure regulator and flow meter or 
combination thereof. [NFPA 99 5.1.10.5.5.4] 

Pressure regulators alone shall not be used to 
control purge gas flow rates. [NFPA 99 5.1.10.5.5.5] 

During and after installation, openings in the 
piping system shall be kept sealed to maintain a 
nitrogen atmosphere within the piping to prevent 
debris or other contaminants from entering the 
system. [NFPA 99 5.1.10.5.5.6] 

While a joint is being brazed, a discharge 
opening shall be provided on the opposite side of the 
joint from where the purge gas is being introduced. 
[NFPA 99 5.1.10.5.5.7] 

The flow of purge gas shall be maintained until 
the joint is cool to the touch. [NFPA 99 5.1.10.5.5.8] 

After the joint has cooled, the purge discharge 
opening shall be sealed to prevent contamination of 
the inside of the tube and maintain the nitrogen 
atmosphere within the piping system. [NFPA 99 
5.1.10.5.5.9] 

The final connection of new piping to an 
existing, in-use pipeline shall be permitted to be 



1320.4-1321.1 

made without the use of a nitrogen purge. [NFPA 99 
5.1.10.5.5.10] 

After a final connection in a positive pressure 
medical gas pipeline is made without a nitrogen 
purge, an outlet in the immediate downstream zone 
of the affected portions of both the new and existing 
in-use piping shall be tested in accordance with 
NFPA 99: 5.1.12.3.9, Final Tie-in Test. [NFPA 99 
5.1.10.5.5.11] 

1 320.7 After brazing, the outside of all joints shall 
be cleaned by washing with water and a wire brush 
to remove any residue and permit clear visual 
inspection of the joint. [NFPA 99 5.1.10.5.7.1] 

Where flux has been used, the wash water shall 
be hot. [NFPA 99 5.1.10.5.7.2] 

Each brazed joint shall be visually inspected 
after cleaning the outside surfaces. [NFPA 99 
5.1.10.5.7.3] 

Joints exhibiting the following conditions shall 
not be permitted: 

(1) Flux or flux residue (when flux or flux 
coated BAg series rods are used with 
dissimilar metals) 

(2) Base metal melting or erosion 

(3) Unmelted filler metal 

(4) Failure of the filler metal to be clearly visible 
all the way around the joint at the interface 
between the socket and the tube 

(5) Cracks in the tube or component 

(6) Cracks in the braze filler metal 

(7) Failure of the joint to hold the test pressure 
under the installer-performed initial 
pressure test (1329.10) and standing pressure 
test (1329.11) [NFPA 99 5.1.10.5.7.4 ] 

Brazed joints that are identified as defective 
under conditions 1320.7(2) or (5) shall be replaced. 
[NFPA 99 5.1.10.5.7.5] 

Brazed joints that are identified as defective 
under conditions 1320.7(1), (3), (4), (6), or (7) shall be 
permitted to be repaired, except that no joint shall be 
reheated more than once before being replaced. 
[NFPA 99 5.1.10.5.7.6] 

1321.0 Valves - Requirements, Locations, and 
Labeling. 

1321.1 General Requirements. Shutoff valves 
accessible to other than authorized persomiel shall 
be installed in valve boxes with frangible or 
removable windows large enough to permit manual 
operation of valves. [NFPA 99 5.1.4.2.1] 

Shutoff valves for use in certain areas, such as 
psychiatric or pediatric, shall be permitted to be 



197 



1321.1 -1321.8 



UNIFORM PLUMBING CODE 



secured with the approval of the Authority Having 
Jurisdiction to prevent inappropriate access. [NFPA 
99 5.1.4.2.2] 

1321.1.1 Where valves are concealed in any 
enclosure, the door or entry to the enclosure 
shall be identified and color coded with the type 
of gas service installed, as described in Section 
1324.0. Enclosures shall be of sufficient size to 
permit valve operation. Valve handles in the off 
position shall prevent closure of the access panel 
or door. 

1321.2 In-line shutoff valves intended for use to 
isolate piping for maintenance or modification shall 
meet the following requirements: 

(1) Be located in a restricted area 

(2) Be locked or latched open 

(3) Be identified in accordance with Section 
1324. [NFPA 99 5.1.4.9.1] 

1 321 .3 Shutoff valves provided for the connection of 
future piping shall meet the following requirements: 

(1) Be locked in a restricted area 

(2) Be locked or latched closed 

(3) Be identified in accordance with Section 1324 
[NFPA 99 5.1.4.10] 

1321.3.1 Future connection valves shall be 
labeled as to gas content. [NFPA 99 5.1.4.10.1] 

1321.3.2 Downstream piping shall be closed 
with a brazed cap with tubing allowance for 
cutting and rebrazing. [NFPA 99 5.1.4.10.2] 

1321.3.3 A zone valve shall be located 
immediately outside each vital life-support, 
critical care, and anesthetizing location in 
each medical gas and /or vacuum line, and 
located so as to be readily accessible in an 
emergency. [NFPA 99 5.1.4.8.7] 

1321.3.4 All gas-delivery columns, hose reels, 
ceiling tracks, control panels, pendants, booms 
or other special installations shall be located 
downstream of the zone valve. [NFPA 99 
5.1.4.8.7.1] 

1321.3.5 Zone valves shall be so arranged that 
shutting off the supply of gas to any one 
operating room or anesthetizing location will 
not affect the others. [NFPA 99 5.1.4.8.7.2] 

1321.4 Source Valve. A shutoff valve shall be 
placed at the immediate connection of each source 
system to the distribution piping to permit the entire 
source, including all accessory devices (such as hair 
dryers, final line regulators, etc.), to be isolated from 
the facility. [NFPA 99 5.1.4.4] 

1321.4.1 The source valve shall be located in the 
immediate vicinity of the source equipment. 
[NFPA 99 5.1.4.4.1] 



1321.4.2 The source valve shall be labeled in 
accordance with Section 1324.0, Source Valve 
for the (Source Name). [NFPA 99 5.1.4.4.2, 
5.1.11.2.3] 

1321.5 Main Valve. A shutoff valve shall be 
provided in the main supply line inside of the 
building when the source shutoff valve is not 
accessible from within the building. [NFPA 99 
5.1.4.5] 

1 321 .5.1 The main line valve shall be located to 
permit access by authorized personnel only (i.e., 
by locating above a ceiling or behind a locked 
access door). [NFPA 99 5.1.4.5.1] 

1 321 .5.2 The main line valve shall be located on 
the facility side of the source valve and outside 
of the source room, enclosure, or where the main 
line first enters the building. [NFPA 99 5.1.4.5.2] 

1321.5.3 The main line shall be labeled in 
accordance with Section 1324.0. [NFPA 99 
5.1.4.5.3 and 5.1.11.2.4] 

1 321 .5.4 A main line valve shall not be required 
where the source shutoff valve is accessible from 
within the building. [NFPA 99 5.1.4.5.4] 

1321.6 Riser Valve. Each riser supplied from the 
main line shall be provided with a shutoff valve 
adjacent to the riser cormection. Riser valves shall be 
permitted to be located above ceilings, but shall 
remain accessible and not be obstructed. [NFPA 99 
5.1.4.6, 5.1.4.6.1] 

1321.7 Zone Valve. All station outlets /inlets shall 
be supplied through a zone valve as follows: 

(1) The zone valve shall be placed such that a 
wall intervenes betw^een the valve and 
outlets /inlets that it controls. 

(2) The zone valve shall serve only outlets /inlets 
located on that same story. 

1321.7.1 Zone valves shall be readily operable 
from a standing position in the corridor on the 
same floor they serve. [NFPA 99 5.1.4.8.1] 

1 321 .7.2 Zone valves shall be so arranged that 
shutting off the supply of medical gas or 
vacuum to one zone will not affect the supply of 
medical gas or vacuum to another zone or the 
rest of the system. [NFPA 99 5.1.4.8.2] 

1321.8 Service Valves. Service valves shall be 
placed in the branch piping prior to any zone valve 
box assembly on that branch. [NFPA 99 5.1.4.7.2] 

1321.8.1 Only one service valve shall be 
required for each branch off of a riser regardless 
of how many zone valve boxes are installed on 
that lateral. [NFPA 99 5.1.4.7.1] 

1321.8.2 Service valves shall be installed to 



198 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

allow servicing or modification of lateral branch 
piping from a main or riser without shutting 
down the entire main, riser, or facility. [NFPA 99 
5.1.4.7] 

1322.0 Pressure-Regulating Equipment 

1322.1 Pressure-regulating equipment shall be 
installed in the supply main upstream of the final 
line-pressure valve. Where multiple piping systems 
for the same gas at different operating pressures are 
required, separate pressure-regulating equipment, 
relief valves, and source shutoff valves shall be 
provided for each pressure. 

1322.2 Each central supply system shall have a 
pressure relief valve set at fifty (50) percent above 
normal line pressure, installed downstream of the 
pressure regulator and upstream of any shutoff 
valve. This pressure relief valve shall be permitted to 
be set at a higher pressure, provided another 
pressure relief valve set at 50 percent above normal 
line pressure is installed in the main supply line. 

1322.2.1 All pressure relief valves shall close 
automatically when excess pressure has been 
released. 

1 322.2.2 Pressure relief valves set at 50 percent 
shall be vented to the outside from all gas 
systems, except medical air, or if the total 
capacity of the supply system is in excess of 3000 
ft^ (85 m^) of gas. 

1 322.2.3 Pressure relief valves shall be of brass 
or bronze and specially designed for the gas 
service involved. 

1322.2.4 A pressure relief valve shall not be 
isolated from its intended use by any valve. 

1322.3 Pressure Gauges. 

Pressure and vacuum indicators shall be readable 
from a standing position. Pressure/vacuum 
indicators shall be provided at the following 
locations, as a minimum: 

(1) Adjacent to the alarm- initiating device for 
soiirce main line pressure and vacuum alarms 
in the master alarm system 

(2) At or in area alarm panels to indicate the 
pressure /vacuum at the alarm activating 
device for each system that is monitored by 
the panel 

(3) On the station outlet /inlet side of zone 
valves [NFPA 99 5.1.8.2.1, 5.1.8.2.2] 

1323.0 Station Outlets/Inlets. 

Station outlets and inlets shall be installed in strict 
accordance with the manufacturer's instructions. 

1323.1 After installation of the piping, but before 



1321.8-1324.4 

installation of the station outlets / inlets and other 
medical gas and medical gas system components 
(e.g., pressure-actuating switches for alarms, 
manifolds, pressure gauges, or pressure relief 
valves), the line shall be blown clear by means of oil- 
free, dry nitrogen. 

1324.0 Labeling and Identification. The gas content 
of medical gas piping systems shall be readily 
identifiable by appropriate labeling with the name 
and pressure contained. Such labeling shall be by 
means of metal tags, stenciling, stamping, or 
adhesive markers, in a manner that is not readily 
removable. Where supplementary color identification 
of piping if (sic) (probably means "is") used, it shall 
be in accordance with the gases and colors indicated 
in CGA Pamphlet C-9, Standard Color-Marking of 
Compressed Cylinders Intended for Medical Gas Use, See 
Table 13-1. 

1324.1 Piping shall be labeled by stenciling or 
adhesive markers that identify the medical gas or 
vacuum system. [NFPA 99 5.1.11.1.1] 

Pipe labels shall show the name of the 
gas /vacuum system or the chemical symbol. [NFPA 
99 5.1.11.1.2] 

Pipe labels shall be located as follows: 

(1) At intervals of not more than 6100 mm (20 ft) 

(2) At least once in or above every room 

(3) On both sides of walls or partitions penetrated 
by the piping 

(4) At least once in every story height traversed 
by risers [NFPA 99 5.1.11.1.4] 

1 324.2 Shutoff valves shall be identified as follows: 

(1) The name or chemical symbol for the 
specific medical gas or vacuum systemi 

(2) The room or areas served 

(3) A caution to not close or open valve except 
in emergency [NFPA 99 5.1.11.2.1] 

1 324.3 Station outlets and inlets shall be identified as 
to the name or chemical symbol for the specific 
medical gas or vacuum provided. [NFPA 99 
5.1.11.3.1] 

1324.4 The shutoff valves described in Sections 
1321.4, 1321.5, and 1321.6 shall be labeled to reflect 
the rooms that are controlled by such valves. 
Labeling shall be kept current from initial 
construction through acceptance. Valves shall be 
labeled in substance as follows: 

In-line shutoff valves shall be labeled in substance 
as follows: 



199 



1324.4-1326.3 



UNIFORM PLUMBING CODE 



CAUTION 

(NAME OF MEDICAL GAS) VALVE 

DO NOT CLOSE EXCEPT IN EMERGENCY 

THIS VALVE CONTROLS SUPPLY TO... 

Source valves shall be labeled in substance as 
follows: 

SOURCE VALVE 

FOR THE (SOURCE NAME). 

Main line valves shall be labeled in substance as 
follows: 

MAIN LINE VALVE FOR THE 

(GAS/VACUUM NAME) SERVING THE 

(NAME OF BUILDING). 

Riser valve(s) shall be labeled in substance as 
follows: 

RISER FOR THE (GAS/VACUUM NAME) 

SERVING (NAME OF THE AREA/BUILDING 

SERVED BY THE PARTICULAR RISER). 

Service valve(s) shall be labeled in substance as 
follows: 

SERVICE VALVE FOR THE 

(GAS/VACUUM NAME) SERVING 

(NAME OF THE AREA/BUILDING 

SERVED BY THE PARTICULAR VALVE). 

[NFPA 99 5.1.11.2.1] 

1325.0 Alarms. All master, area, and local alarm 
systems used for medical gas and vacuum systems 
shall include the following: 

(1) Separate visual indicators for each condition 
monitored, except as permitted for local 
alarms that are displayed on master alarm 
panels 

(2) A cancelable audible indication of each 
alarm condition that produces a sound 
with a minimum level of 80 dBA 
at 920 mm (3 ft.) 

(3) A means to visually identify a lamp or LED 
failure 

(4) Visual and audible indication that the 
wiring to an alarm initiating device is 
disconnected 

(5) Labeling of each indicator, indicating the 
condition monitored 

(6) Labeling of each alarm panel for its area of 
surveillance [NFPA 99 5.1.9.1(1), (3), (4), (5), 
(6), (7)] 

1325.1 Functioning of all alarm components shall be 
verified in accordance with testing and monitoring 



requirements of the manufacturer and the Authority 
Having Jurisdiction. 

1326.0 Medical Air System. Medical air 
compressors shall be installed in a well-lit, 
ventilated, and clean location and shall be accessible. 
The location shall be provided with drainage 
facilities. The medical air compressor area shall be 
located separately from medical gas cylinder system 
sources, and shall be readily accessible for 
maintenance. 

1326.1 Medical air compressors shall be sufficient to 
serve the peak calculated demand with the largest 
single compressor out of service. In no case shall 
there be fewer than 2 (two) compressors. [NFPA 99 
5.1.3.5.11.2] 

Medical air compressor systems shall consist of the 
following: 

(1) An automatic means to prevent backflow 
from all on-cycle compressors through all 
off-cycle compressors 

(2) A manual shutoff valve to isolate each 
compressor from the centrally piped system 
and from other compressors for maintenance 
or repair without loss of pressure in the system 

(3) Intake filter-mufflers of the dry type 

(4) Pressure relief valves set at 50 percent above 
line pressure 

(5) Piping between the compressor and the 
source shutoff valve compatible with 
oxygen that does not contribute to 
contaminant levels and is cleaned for 
oxygen use 

[NFPA 99 5.1.3.5.3.2] 

1 326.2 The medical air compressors shall draw their 
air from a source of clean air located where no 
contamination is anticipated from engine exhausts, 
fuel storage vents, medical-surgical vacuum system 
discharges, particulate matter, or odor of any type. 
[NFPA 99 5.1.3.5.13.1] 

1326.3 Compressor intake piping shall be of 
materials approved for vacuum piping under 
1317.10 that will not add contaminants in the form of 
particulate matter, odor, or other gases. [NFPA 99 
5.1.3.5.13.4, same words, new citation] 

The compressor air intake shall be located 
outdoors above roof level, at a minimum distance of 
3050 mm (10 ft) from any door, window, exhaust, 
other intake, or opening in the building and a 
minimum distance of 6100 mm (20 ft) above the 
ground. [NFPA 99 5.1.3.5.13.2] 

If an air source equal to or better than outside air 
(e.g., air already filtered for use in operating room 



200 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

ventilating systems) is available, it shall be permitted 
to be used for the medical air compressors with the 
following provisions: 

(1) This alternate source of supply air shall be 
available on a continuous 24-hour-per-day, 
7-day-per-week basis. 

(2) Ventilating systems having fans with motors 
or drive belts located in the air stream shall 
not be used as a source of medical air intake. 
[NFPA 99 5.1.3.5.13.3] 

Air intakes for separate compressors shall be 
permitted to be joined together to one common 
intake where the following conditions are met: 

(1) The common intake is sized to minimize 
back pressure in accordance with the 
manufacturer's recommendations 

(2) Each compressor can be isolated by manual 
or check valve, blind flange, or tube cap to 
prevent open inlet piping when compressors 
are removed from service and consequent 
backflow of room air into the other com- 
pressor (s) [NFPA 99 5.1.3.5.13.5] 

1326.3.1 Each medical air compressor shall have 
an isolation valve installed so that shutting off or 
failure of the largest unit will not affect the 
operation of the other unit(s). 

1326.4 Drains shall be installed on dryers, 
aftercoolers, separators, and receivers. 

1 326.5 Medical air receivers shall be provided with a 
three-valve bypass to permit service to the receiver 
without shutting down the medical air system. 
[NFPA 99 5.1.3.5.11.4] 

1326.6 Medical Air Receivers. Receivers for 

medical air shall meet the following requirements: 

(1) Be made of corrosion-resistant materials or 
otherwise be made corrosion resistant 

(2) Comply Avith Section VIII, Unfired Pressure 
Vessels, of the ASME Boiler and Pressure 
Vessel Code 

(3) Be equipped with a pressure relief valve, 
automatic drain, manual drain, sight glass, 
and pressure indicator 

(4) Be of a capacity sufficient to prevent the 
compressor from short cycling [NFPA 99 
5.1.3.5.6] 

Piping within compressor systems upstream 
of the source shutoff valve shall comply with 
Sections 1317 and 1320 except that stainless steel 
shall be permitted to be used as a piping 
material. 

1327.0 IVIedical Vacuum Pump System. The 

vacuum plant shall be installed in a well lit, ventilated 



1326.3-1327.2 

and clean location with ample accessibility. The 
location shall be provided with drainage facilities. The 
vacuum plant, when installed as a source, shall be 
located separately from other medical vacuum system 
sources, and shall be readily accessible for 
maintenance. 

1327.1 IVIedical-surgical vacuum sources shall 
consist of the following: 

(1) Two or more vacuum pumps sufficient to 
serve the peak calculated demand with the 
largest single vacuum pump out of service 

(2) An automatic means to prevent backflow 
from any on-cycle vacuum pumps through 
any off-cycle vacuum pumps 

(3) A shutoff valve or other isolation means to 
isolate each vacuum pump from the 
centrally piped system and other vacuum 
pumps for maintenance or repair without 
loss of vacuum in the system [NFPA 99 
5.1.3.6.1.2(1), (2), (3)] 

1327.1.1 Additional pumps shall automatically 
activate when the pumps in operation are 
incapable of adequately maintaining the 
required vacuum. 

Automatic or manual alternation of pumps 
shall allow division of operating time. If 
automatic alternation of pumps is not provided, 
the facility staff shall arrange a schedule for 
manual alternation. [NFPA 99 5.1.3.6.6.1, 
5.1.3.6.6.2] 

1327.2 The medical-surgical vacuum pumps shall 
exhaust in a manner and location that will minimize 
the hazards of noise and contamination to the facility 
and its enviromnent. 

The exhaust shall be located as follows: 

(1) Outdoors 

(2) At least 3050 mm (10 ft.) from any door, 
window, air intake, or other openings in 
buildings 

(3) At a level different from air intakes 

(4) Where prevailing winds, adjacent buildings, 
topography, or other influences that would 
not divert the exhaust into occupied areas or 
prevent dispersion of the exhaust 

The end of the exhaust shall be turned down 
and screened or otherwise be protected against 
the entry of vermin, debris, or precipitation by 
screening fabricated or composed of a non- 
corroding material. 

The exhaust shall be piped of materials 
approved for medical-surgical vacuum piping 
under Section 1317.3 (Vacuum tubes...). 



201 



1327.2-1329.7 



UNIFORM PLUMBING CODE 



The exhaust shall be free of dips and loops 
that might trap condenisate or oil. Where such 
low points are unavoidable, a drip leg and 
valved drain shall be installed. [NFPA 99 
5.1.3.6.7.1 - .5] 

1327.2.1 Vacuum exhausts from multiple 
pumps shall be permitted to be joined together 
to one common exhaust where the following 
conditions are met: 

(1) The common exhaust is sized to 
minimize back pressure in accordance 
with the pump manufacturer's recom 
mendations. 

(2) Each pump can be isolated by manual 
or check valve, blind flange, or tube cap 
to prevent open exhaust piping when 
pumps' are removed for service and 
consequent flow of exhaust air into the 
room. [NFPA 99 5.1.3.6.7.6] 

1327.3 RESERVED 

1327.4 Receivers for vacuum shall meet the 
following requirements: 

(1) Be made of ferrous and /or non-ferrous 
materials 

(2) Comply with Section VIII, Unfired Pressure 
Vessels, of the ASME Boiler and Pressure 
Vessel Code 

(3) Be capable of withstanding a gauge pressure 
of 415 kPa (60 psi) and 760 mm (29.9 in.) 
gauge HgV 

(4) Be equipped with a manual drain 

(5) Be of a capacity based on the technology of 
the pumps. [NFPA 99 5.1.3.6.3] 

1 327.5 Piping between vacuum pumps, discharges, 
receivers, and the vacuum m.ain line valve shall be in 
accordance with Section 1317.1 except that steel pipe 
shall be permitted to be either black or galvaruzed. 

1 327.6 Drains shall be installed and terminate in an 
approved location. 

1328.0 RESERVED 

1329.0 Testing and Inspection. 

1329.1 Scope inspection and testing shall be 
performed on all-new piped gas systems, additions, 
renovations, temporary installations, or repaired 
systems, to ensure the facility, by a documented 
procedure, that all applicable provisions of this 
document have been adhered to and system integrity 



has been achieved or maintained. [NFPA 99 
5.1.12.1.1.] 

1329.1.1 Tests and inspections required by this 
section shall not be interpreted to conflict with 
the requirements of NFPA 99 Standard for Health 
Care Facilities. Final certification or verification 
shall require the completion of all tests and 
inspections required by sections 4-3.4.1.1, 4- 
3.4.1.2, and 4-3.4.1.3 of NFPA 99 Standard for 
Health Care Facilities. For requirements of the 
portions of medical gas and medical vacuum 
systems testing and inspection not addressed in 
this chapter or medical gas and medical vacuum 
systems testing and inspection beyond the scope 
of this chapter refer to NFPA 99 Standard for 
Health Care Facilities. 

1329.2 All systems that are breached and 
components that are subject to additions, 
renovations, or replacement (e.g., new gas sources: 
bulk, manifolds, compressors, dryers, alarms) shall 
be inspected and appropriately tested. [NFPA 99 
5.1.12.1.3] 

1329.2.1 Systems shall be deemed breached at 
the point of pipeline intrusion by physical 
separation or by system component removal, 
replacement, or addition. 

Breached portions of the systems subject 
to inspection and testing shall be confined to 
only the specific altered zone and 
components in the immediate zone or area 
that is located upstream for vacuum systems 
and downstream for pressure gases at the 
point or area of intrusion. [NFPA 99 
5.1.12.1.4,5.1.12.1.5] 

1329.3 Advance Notice. It shall be the duty of the 
person doing the work authorized by the permit to 
notify the Authority Having Jurisdiction, orally or in 
writing, that said work is ready for inspection. Such 
notification shall be given not less than twenty-four 
(24) hours before the work is to be inspected. 

1329.4 Responsibility. The equipment, material, 
and labor necessary for inspection and testing shall 
be furnished by the permit holder or by the person 
who is requiring the inspection. 

1329.5 Testing. Test shall be conducted in the 
presence of the Authority Having Jurisdiction or a 
duly appointed representative. 

1329.6 Retesting. If the Authority Having 
Jurisdiction finds that the work does not pass tests, 
necessary corrections shall be made and the work 
shall then be resubmitted for test or inspection. 

1329.7 Initial Pressure Test - Piped Gas 
Systems. Before attachment of system 
components (e.g., pressure-actuating switches for 



202 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 

alarms, manifolds, pressure gauges, or pressure 
relief valves), but after installatiori of the station 
outlets and inlets, with test caps in place, each 
section of the piping system shall be subjected to a 
test pressure of one and a half (1-1/2) times the 
working pressure [minimum one hundred-fifty 
(150) psig (1 Mpa gauge)] with oil-free dry 
nitrogen. This test pressure shall be maintained 
until each joint has been examined for leakage by 
means of soapy water or other equally effective 
means of leak detection safe for use with oxygen. 
The source shutoff valve shall be closed. Leaks, if 
any, shall be located, repaired, and retested in 
accordance with this paragraph. [NFPA 99 
5.1.12.2.3.7] 

1329.8 Cross-connection Test - Piped Gas 
Systems. It shall be determined that no cross 
connections exist between the various medical gas 
and vacuum piping systems. [NFPA 99 5.1.12.2.4] 

All piping systems shall be reduced to 
atmospheric pressure. [NFPA 99 5.1.12.2.4.1] 

Sources of test gas shall be disconnected from all 
piping systems except for the one system being tested. 
[NFPA 99 5.1.12.2.4.2] 

The system under test shall be charged with 
oil-free, dry nitrogen NF to a gauge pressure of 
345 kPa (50 psi). [NFPA 99 5.1.12.2.4.3] 

After the installation of the individual faceplates 
with appropriate adapters matching outlet /inlet 
labels, each individual outlet /inlet in each installed 
medical gas and vacuum piping system shall be 
checked to determine that the test gas is being 
dispensed only from the piping system being tested. 
[NFPA 99 5.1.12.2.4.4] 

1329.8.1 The source of test gas shall be 
disconnected and the system tested shall be 
reduced to atmospheric pressure. Each 
additional piping system shall then be tested in 
accordance with 1329.9. [NFPA 99 5.1.12.2.4.1, 
5.1.12.2.4.5] 

1329.8.2 Where a medical vacuum system is 
installed, the cross-connection testing shall 
include that piped vacuum system with all 
medical gas-piping systems. 

1329.8.3 All medical-surgical vacuum systems 
shall be in operation so that these vacuum 
systems are tested at the same time the medical 
gas systems are tested. The proper labeling and 
identification of system outlets /inlets shall be 
confirmed during these tests. [NFPA 99 
5.1.12.2.4.6] 

1329.9 Final Testing Standing Pressure Test - 
Piped Gas Systems. After successful completion of 
the initial pressure tests imder Section 1329.7, medical 



1329.7-1329.10 

gas distribution piping shall be subject to a standing 
pressure test. [NFPA 99 5.1.12.2.6] 

Tests shall be conducted after the final 
installation of station outlet valve bodies, face plates, 
and other distribution system components (e.g., 
pressure alarm devices, pressure indicators, line 
pressure relief valves, manufactured assemblies, 
hose, etc.). [NFPA 99 5.1.12.2.6.1] 

The source valve shall be closed during this test. 
[NFPA 99 5.1.12.2.6.2] 

The piping systems shall be subjected to a 24-hour 
standing pressure test using oil-free, dry nitrogen NF. 
[NFPA 99 5.1.12.2.6.3] 

Test pressures shall be 20 percent above the 
normal system operating line pressure. [NFPA 99 
5.1.12.2.6.4] 

1329.9.1 After the piping system is filled with 
test gas, the supply valve and all outlets shall 
be closed and the source of test gas 
disconnected. The piping system shall remain 
leak-free for 24 hours. When making the 
standing pressure test, the only allowable 
pressure changes during the 24-hour test 
period shall be those caused by variations in 
the ambient temperature around the piping 
system. [NFPA 99 4-3.4.1.2(e)l] 

At the conclusion of the tests, there shall be 
no change in the test pressure other than that 
attributed to changes of ambient temperature. 
[NFPA 99 5.1.12.2.6.5] 

1329.10 Initial Pressure Test ~ Piped Vacuum 
Systems. Each section of the piping in medical gas 
and vacuum systems shall be pressure tested. [NFPA 
99 5.1.12.2.3.1] 

Initial pressure tests shall be conducted as follows: 

(1) After installation of station outlets / inlets 
rough-in assemblies. Test caps shall be 
permitted to be used. 

(2) Prior to the installation of components of the 
distribution piping system that would be 
damaged by the test pressure (e.g., 
pressure/vacuum alarm devices, pres 
sure /vacuum indicators, line pressure relief 
valves, manufactured assemblies with 
flexible hose, etc.). [NFPA 99 5.1.12.2.3.2] 

The source shutoff valve shall remain closed 
during these tests. [NFPA 99 5.1.12.2.3.3] 

The test pressure for pressure gases shall be 
1.5 times the system working pressure but 

not less than a gauge pressure of 1035 kPa (150 

psi). [NFPA 99 5.1.12.2.3.4] 

The test pressure for vacuum shall be not 
less than a gage pressure of 415 kPa (60 psi). 
[NFPA 99 5.1.12.2.3.5] 



203 



1329.10-1331.2 



UNIFORM PLUMBING CODE 



The test pressure shall be maintained until 
each joint has been examined for leakage by 
means of soapy water or other equally effective 
means of leak detection that is safe for use with 
oxygen. [NFPA 99 5.1.12.2.3.6] 

Leaks, if any, shall be located, repaired (if 
permitted), replaced (if required), and retested. 
[NFPA 99 5.1.12.2.3.7] 

1329.11 Standing Pressure Test - Piped Vacuum 
Systems. After successful completion of the initial 
pressure tests under Section 1329.10, vacuum 
distribution piping shall be subjected to a standing 
vacuum test. [NFPA 99 5.1.12.2.7] 

Tests shall be conducted after installation of all 
components of the vacuum system. [NFPA 99 
5.1.12.2.7.1] 

The piping systems shall be subjected to a 24- 
hour standing vacuum test. [NFPA 99 5.1.12.2.7.2] 

Test pressure shall be not less than 300 mm (12 in.) 
gauge HgV. [NFPA 99 5.1.12.2.7.3] 

During the test, the source of test vacuum shall 
be disconnected froni the piping system. [NFPA 99 
5.1.12.2.7.4] 

At the conclusion of the test, there shall be no 
change in the vacuum other than that attributed to 
changes of ambient temperature, as permitted in the 
following: [NFPA 99 5.1.12.2.7.5] 

Test vacuum changes due to expansion or 
contraction shall be permitted to be determined by 
means of the following pressure temperature 
relationship: 

(1) The calculated final absolute pressure equals 
the initial absolute pressure times the final 
absolute temperature, divided by the initial 
absolute temperature. 

(2) Absolute pressure is the gauge pressure 
reading plus 101.4 kPa (14.7 psi). 

(3) Absolute temperature is the temperature 
reading plus 238°C (460°F). 

(4) The final allowable gauge pressure reading 
equals the final allowable absolute pressure 
minus a gauge pressure of 101.4 kPa (14.7 
psi). [NFPA 99 5.1.12.2.7.6] 

Leaks, if any, shall be located, repaired (if permitted) 
or replaced (if required), and retested. [NFPA 99 
5.1.12.2.7.7] 

1329.12 Corrections. Notices of correction or 
violation shall be written by the Authority Having 
Jurisdiction and may be posted at the site of the 
work or mailed or delivered to the permittee or an 
authorized representative. Refusal or failure to 
comply with any such notice or order within ten (10) 
days of receipt thereof, shall be considered a 



violation of this code, and shall be subject to the 
penalties set forth elsewhere in this code for 
violations. 

1329.13 Approval. Upon satisfactory completion of 
all tests and certification of the medical gas and 
medical vacuum systems, a certificate of approval 
shall be issued by the Authority Having Jurisdiction 
to the permittee. 

1329.14 Covering or Use. No medical gas or 
medical va cuum system or part thereof shall be 
covered, concealed, or put into use until it has been 
tested, inspected, and accepted as required in this 
code. 

1329.15 Uncovering. Any medical gas and vacuum 
system or part thereof which is covered or concealed 
before testing and inspected as required in this code 
shall be uncovered for inspection, after notice to 
uncover the work has been issued to the permittee or 
his authorized representative by the Authority 
Having Jurisdiction. 

1330.0 RESERVED 

1331.0 System Certification. 

1331.1 Prior to any medical gas system being placed 
in service, each and every system shall be certified, 
as described in Section 1331.2. 

1331.1.1 Verification tests shall be performed 
only after all tests required in Section 1329.0, 
Installer-Performed Tests, have been completed. 
[NFPA 99 5.1.12.3.1.1] 

Testing shall be conducted by a party 
technically competent and experienced in the 
field of medical gas and vacuum pipeline testing 
and meeting the requirements of ANSI/ASSE 
Standard 6030, Medical Gas Verifiers Professional 
Qualifications Standard. [NFPA 99 5.1.12.3.1.3] 

Testing shall be performed by a party other 
than the installing contractor. [NFPA 99 
5.1.12.3.1.4] 

When systems have been installed by in- 
house personnel, testing shall be permitted by 
personnel of that organization who meet the 
requirements of this section. [NFPA 99 
5.1.12.3.1.5] 

1331.2 Certification tests, verified and attested to by 
the certification agency, shall include the following: 

1331.2.1 Verifying compliance with the 
installation requirements; 

1331.2.2 Testing and checking for leakage, 
correct zoning, and identification of control 
valves; 



204 



HEALTH CARE FACILITIES AND 1 331 .2 - 1 331 .4 

MEDICAL GAS AND VACUUM SYSTEMS 

1331.2.3 Checking for identification and 
labeling of pipelines, station outlets, and control 
valves; 

1331.2.4 Testing for cross-connection, flow rate, 
system pressure drop, and system performance; 

1331.2.5 Functional testing of pressure relief 
valves and safety valves; 

1331.2.6 Functional testing of all sources of 
supply; 

1331.2.7 Functional testing of alarm systems, 
including accuracy of system components; 

1331.2.8 Purge flushing of system and filling 
with specific source gases; 

1331.2.9 Testing for purity and cleanliness of 
source gases; 

1331.2.10 Testing for specific gas identity at each 
station outlet. 

1331.3 The inspection and testing reports shall be 
submitted directly to the party that contracted for the 
testing, who shall submit the report through channels 
to the responsible facility authority and any others that 
are required. [NFPA 99 5.1.12.1.6] 

Reports shall contain detailed listings of all 
findings and results. [NFPA 99 5.1.12.1.7] 

1 331 .4 A report which includes at least the specific 
items mentioned in Section 1331.2 and all other 
information required by NFPA 99 Standard for Health 
Care Facilities shall be delivered to the Authority 
Having Jurisdiction prior to acceptance of the 
system. 



205 



Table 13-1 



UNIFORM PLUMBING CODE 



TABLE 13-1 
Standard Designation Colors and Operating Pressures for Gas and Vacuum Systems 



Gas Service 



Abbreviated 
Name 



Colors 
(Background/Text) 



Standard 
Gauge Pressure 



Medical air 



Carbon dioxide 



Med Air 



COo 



Helium 



Nitrogen 



Nitrous oxide 



He 



Nr 



NoO 



Yellow /black 

Gray /black or 
gray /white 

Brown/ white 
Black /white 
Blue/ white 



345-380 kPa 
(50-55 psi) 

345-380 kPa 
(50-55 psi) 

345-380 kPa 
(50-55 psi) 

1100-1275 kPa 
(160-185 psi) 

345-380 kPa 
(50-55 psi) 



Oxygen 

Oxygen /carbon 
dioxide mixture 

Medical-surgical vacuum 

Waste anesthetic 
gas disposal 

Other mixtures 



O2 

02/C02n 
(n is % of CO2) 

Med Vac 
WAGD 

GasA%/GasB% 



Green /white or 
white /green 

Green /white 



White /black 

Violet /white 

Colors as above 

Major gas for background/ 

minor gas for text 



345-380 kPa 
(50-55 psi) 

345-380 kPa 
(50-55 psi) 

360 mm to 760 mm 
(15 in. to 30 in. HgV) 

Varies with system type 
None 



Nonmedical air 
(level 3 gas-powered device) 

Nonmedical and Level 3 
vacuum 

Laboratory air 
Laboratory vacuum 
Instrument air 



Yellow and white diagonal 
stripe /black 

White and black diagonal 
stripe /black boxed 

Yellow and white 
checkerboard / black 

White and black 
checkerboard /black boxed 

Red/white 



None 



None 



None 



None 



1100-1275 kPa 
(160-185 psi) 



206 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 



Table 13-2 -Table 13-3 



TABLE 13-2 
Minimum Flow Rates 



Oxygen 

Nitrous Oxide 

Medical Compressed Air 

Nitrogen 

Vacuum 

Carbon Dioxide 

Helium 



.71 CFM per outlet^ (20 LPM) 

.71 CFM per outlet^ (20 LPM) 

.71 CFM per outlet^ (20 LPM) 

15 CFM (0.42 mVmin.) free air per outlet 

1 SCFM (0.03 smVmin.) per inlet^ 

.71 CFM per outlet^ (20 LPM) 

.71 CFM per outlet (20 LPM) 



Any room designed for a permanently located respiratory ventilator or anesthesia machine shall have an 
outlet capable of a flow rate of 180 LPM (6.36 CFM) at the station outlet. 

For testing and certification purposes, individual station inlets shall be capable of a flow rate of 3 SCFM, 
while maintaining a system pressure of not less than 12 inches (305 mm) at the nearest adjacent vacuum 
inlet. 



TABLE 13-3 
Minimum Outlets/Inlets per Station 



Location 



Oxygen Medical Medical Nitrous Nitrogen Helium Carbon 
Vacuum Air Oxide Dioxide 



Patient rooms for 
medical / surgical, 
obstetrics, and pediatrics 

Examination / treatment 
for nursing units 

Intensive care (all) 

Nursery^ 

General operating rooms 

Cystoscopic and invasive 
special procedures 

Recovery delivery and 
labor /delivery/ 
recovery rooms^ 

Labor rooms 

First aid and emergency 
treatment^ 

Autopsy 

Anesthesia workroom 



1/bed 

1/bed 

3 /bed 

2 /bed 

2 /room 

2 /room 

2 /bed 
2 /room 

1/bed 
1/bed 



1/bed 



1/bed 
1/bed^ 



1/bed — 



1/bed — 

3 /bed 2 /bed 

2 /bed 1/bed 

3 /room* 2 /room 

3 /room* 2 /room 

2/bed 1/bed 

3 /room* 1/room 



1/bed 
1/bed 



— 1 / station 1 / station 
1 / station — 1 / station 



1/room 1/room 



Includes pediatric nursery. 

Includes obstetric recovery. 

Emergency trauma rooms used for surgical procedures shall be classified as general operating rooms. 

Vacuum inlets required are in addition to any inlets used as part of a scavenging system for removal of 
anesthetizing gases. 



207 



Table 13-4 -Table 13-5 



UNIFORM PLUMBING CODE 



TABLE 13-4 
System Sizing - Flow Requirements for Station Inlet/Outlef 







Minimum Permissible 


Number of 

Inlet/Outlet Terminal 

Units per Facility 


Diversity Percentage 

of Average Flow per 

Inlet/Outlet Terminal Units 


System Flow^ 
SCFI\/I (liters/minute) 

All Pressurized Vacuum 
Medical Gas Systems Systems 


1-10 


100% 


Actual Demand See 


11-25 


75% 


7.0 (200) Table 


26-50 


50% 


13.1 (375) 13-5 


51-100 


50% 


17.5 (500) 



^ Flow rates of station inlets /outlets per Table 13-2. 

^ The minimum system flow is the average inlet /outlet flow times the number of station inlets /outlets times the diversity 
percentage. 



TABLE 13-5 
Outlet Rating for Vacuum Piping Systems 





Free-Air Allowance, 

Expressed as CFM (LPM) 

at 1 Atmosphere 


Zone Allowances 

Corridors-Risers 

Main Supply Line-Valves 


Location of Medical-Surgical 
Vacuum Outlets 


Per Room 


Per Outlet 


Simultaneous 

Usage, 
Factor Percent 


Air to Be 
Transported 
CFM (LPM)* 


Operating Rooms 

Major "A" (Radical, Open Heart) 
(Organ Transplant) 
(Radical Thoracic) 

Major "B"(A11 Other Major ORs) 

Minor 


3.5 (99.1) 
3.5 (99.1) 
3.5 (99.1) 

2.0 (56.6) 

1.0 (28.3) 


- 


100 
100 
100 

100 

100 


3.5 (99.1) 
3.5 (99.1) 
3.5 (99.1) 

2.0 (56.6) 

1.0 (28.3) 


Delivery Rooms 


1.0 (28.3) 


- 


100 


1.0 (28.3) 


Recovery Rooms (Post- 

Anesdiesia) and 
Intensive Care Units (a minimum 

of 2 outlets per bed in each 

such depaiUuent) 

1st outlet at each bed 
2nd outlet at each bed 
3rd outlet at each bed 
All others at each bed 


- 


3.0 (85.0) 
1.0 (28.3) 
1.0 (28.3) 
1.0 (28.3) 


50 
50 
10 
10 


1.5 (42.5) 
0.5 (14.2) 
0.1 (2.8) 
0.1 (2.8) 


Emergency Rooms 


- 


1.0 (28.3) 


100 


1.0 (28.3) 


Patient Rooms 
Surgical 
Medical 
Nurseries 


- 


1.0 (28.3) 
1.0 (28.3) 
1.0 (28.3) 


50 
10 
10 


0.5 (14.2) 
0.1 (2.8) 
0.1 (2.8) 


Treatment and Examining Rooms 


- 


0.5 (14.2) 


10 


0.05 (1.4) 


Autopsy Area 


- 


2.0 (56.6) 


20 


0.4 (11.3) 


Inhalation Therapy, Central 
Supply and Instructional Areas 


- 


1.0 (28.3) 


10 


0.1 (2.8) 



*Free air at 1 atmosphere 



208 



HEALTH CARE FACILITIES AND 
MEDICAL GAS AND VACUUM SYSTEMS 



Table 13-6 -Table 13-7 



TABLE 13-6 
Size of Gas/Vacuum Piping 







l\/laximum 


Delivery Capacity^ 


in SCFM (LPM) 










Medical Gas Pipe Size 
System Incii^ 


100 


Length of Piping in Feet (m)' 
(30) 250 (76) 500 


(152) 


750 


(228) 


1000 


(304) 


Oxygen 


1/2 

3/4 

1 


15.0 
40.0 
50.0 


(425) 
(1133) 
(1416) 


10.6 
28.3 
50.0 


(300) 
(801) 
(1416) 


7.4 
19.6 
40.2 


(209) 
(555) 
(1138) 


5.9 
15.7 
32.2 


(167) 
(445) 
(912) 


5.1 
13.3 

27.7 


(144) 
(377) 
(784) 


1/2 
Nitrous Oxide 3/4 
1 


15.0 
30.0 
40.0 


(425) 
(849) 
(1113) 


9.5 
24.7 
40.0 


(269) 
(699) 
(1133) 


6.5 
17.1 
34.7 


(184) 
(484) 
(983) 


5.3 
13.7 
28.2 


(150) 
(388) 
(798) 


4.5 
11.7 
24.3 


(127) 
(331) 
(688) 


Medical Air 


1/2 

3/4 

1 


18.1 
40.0 
50.0 


(512) 
(1133) 
(1416) 


11.1 
29.9 
50.0 


(314) 
(847) 
(1416) 


7.8 
21.0 
42.1 


(221) 
(595) 
(1192) 


6.3 
16.5 
35.8 


(177) 
(467) 
(1013) 


5.3 
14.1 
29.2 


(151) 
(399) 
(826) 


Vacuum 


1 

1-1/4 

1-1/2 

2 


22.8 
40.1 
63.7 
132.7 


(645) 
(1135) 
(1804) 
(3758) 


13.7 

24.5 
38.9 
81.4 


(388) 
(694) 
(1101) 
(2305) 


9.5 
16.7 
26.8 
56.0 


(269) 
(473) 
(759) 
(1586) 


7.6 
13.3 
21.1 
45.0 


(215) 
(377) 
(600) 
(1274) 


6.5 
11.2 
17.9 
38.3 


(184) 
(317) 
(507) 
(1084) 


Nitrogen 


1/2 

3/4 

1 


25.0 
60.0 
110.0 


(708) 
(1699) 
(3115) 


25.0 
60.0 
110.0 


(708) 
(1699) 
(3115) 


25.0 
60.0 
110.0 


(708) 
(1699) 
(3115) 


23.8 
60.0 
110.0 


(674) 
(1699) 
(3115) 


20.6 
54.2 
110.0 


(583) 
(1535) 
(3115) 



' Length of piping includes a 30% allowance for fittings. 

^ One-half inch (12.7 mm) diameter pipe is the minimum size allowed in medical gas systems. 

' Based on the following maximum pressure drops: 

Oxygen, nitrous oxide, and medical air - 5 psig (10 in. Hg) 

Vacuum - 1.96 psig (4 in. Hg) 

Nitrogen - 20 psig (41 in. Hg) 



TABLE 13-7 
Maximum Pipe Support Spacing 











Hanger Spacing 






Pipe Size 




mm ft. 


DN8 




(NPSl/4) 


(3/8in.O.D.) 


1520 5 


DNIO 




(NFS 3/8) 


(l/2in.O.D.) 


1830 6 


DN15 




(NFS 1/2) 


(5/8in.O.D) 


1830 6 


DN20 




(NFS 3/4) 


(7/8 in. O.D.) 


2130 7 


DN25 




(NFS 1) 


(1-1/8 in. O.D.) 


2440 8 


DN32 




(NFS 1-1/4) 


(1-3/8 in. O.D.) 


2740 9 


DN40 




(NFS 1-1/2) 


(1-5/8 in. O.D.) 




and larger 








3050 10 


Vertical risers. 


all 


sizes 






Every floor but not to exceed: 




4570 15 



[NFFA 99 5.1.10.6.4.1] 



209 



UNIFORM PLUMBING CODE 



210 



CHAPTER 14 

MANDATORY REFERENCED STANDARDS 

TABLE 14-1 
Standards for Materials, Equipment, Joints and Connections 

Where more than one standard has been listed for the same material or method, 
the relevant portions of all such standards shall apply. 



Standard Number 


Standard Title 


Application 


AHAM DW-1-92 


Household Electric Dishwashers 


Appliances 


AHAM DW-2PR-92 


Plumbing Requirements for Household Dishwashers 


Appliances 


AHAM FWD-1-92 


Food Waste Disposers 


Appliances 


AHAM HLW-2 PR-86 


Plumbing Requirements for Home Laundry Equipment 


Appliances 


ANSIA13.1-81(R93) 


Scheme for the Identification of Piping Systems 


Piping 


1 ANSIA21.10-98 


Ductile-Iron and Gray-Iron Fittings, 3 in. through 48 in. 
(75 mm through 1200 mm), for Water and Other Liquids 






(same as AWWA CI 10) 


Piping, Ferrous 


1 ANSIA21.11-2000 


Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and 






Fittings (same as AWWA Clll) 


Piping, Ferrous 


1 ANSI A21.51-96 


Ductile-Iron Pipe, Centrifugally Cast, for Water (same as 






AWWA C151) 


Piping, Ferrous 


1 ANSI A21.53-2000 


Ductile-Iron Compact Fittings, 3 in. through 24 in. 
(76 mm through 610 mm) and 54 in. through 
64 in. (1400 mm through 1600 mm), for Water Service 






(same as AWWA C153) 


Piping, Ferrous 


ANSI A40.3-93 


Stainless Steel 


Piping, Ferrous 


ANSI A106.6-70 


Vitrified Clay Pipe (now CSA A60.1M-76[C1992]) 


Piping, Non-Metallic 


ANSIA112.14.1-75(R90) 


Backwater Valves 


Valves 


1 ANSI Al 12.19.5-99 


Trim for Water-Closet Bowls, Tanks, and Urinals 


Fixtures 


ANSI A112.21.2M-83 


Roof Drains 


DWV Components 


ANSI A118.10-93 


Load, Bearing, Bonded, Waterproof Membranes for 






Thin-Set Ceramic Tile and Dimension Stone Installations 


Fixtures 


ANSI B2.1-90 


Pipe Threads (Except Dryseal) (replaced by ASME Bl.20.1-98) 


Joints 


ANSI B16.40-85 (R94) 


Manually Operated Thermoplastic Gas Shutoff and Valves 






in Gas Distribution Systems 


Fuel Gas 


ANSI/CSALC 3-2000 


Appliance Stands and Drain Pans 


Miscellaneous 


ANSI/ICC A117.1-98 


Guidelines for Accessible and Usable Buildings and Facilities 


Miscellaneous 



211 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


1 ANSI Z21.10.1-98 


Gas Water Heaters - Volume I - Storage Water Heaters 






with Input Ratings of 75,000 Btu per Hour or Less (22 kW) 


Appliances 


1 ANSI Z21.10.3-2001 


Gas Water Heaters - Volume III - Storage, with Input 






Ratings Above 75,000 Btu per Hour, Circulating and 
Instantaneous Water Heaters 


Appliances 


ANSIZ21.12-90 


Draft Hoods 


Appliances 


1 ANSI Z21.13-2000 


Gas-Fired Low-Pressure Steam and Hot- Water Boilers 


Appliances 


1 ANSI Z21.15-97 


Manually Operated Gas Valves for Appliances, 

Appliance Connector, Valves, and Hose End Valves 


Valves 


1 ANSI Z21. 22-99 


Relief Valves and Automatic Gas Shutoff Devices for 






Hot-Water Supply Systems 


Valves 


ANSI Z21. 24-2001 


Connectors for Gas Appliances 


Appliances 


ANSI Z21. 41-98 


Quick-Disconnect Devices for Use with Gas Fuel Appliances 




CSA 6.9-M98 




Joints 


ANSI Z21. 56-98 


Gas-Fired Pool Heaters 


Sw^imming Pools 


1 CSA 4.7-2001 




and Spas 


ANSI Z21. 69-97 


Connectors for Movable Gas Appliances 


Appliances 


CSA 6.16-M97 






ANSIZ21.70-81[D] 
1 


Earthquake-Actuated Automatic Gas Shutoff Systems 
(withdrawn from ANSI June 1992) (replaced by ASCE 25) 


Valves 


ANSI Z21.80-1997 


Line Pressure Regulators 


Fuel Gas 


CSA 6.22-M97 






ANSI Z21.81-1997 


Cylinder Connection Devices 


Fuel Gas 


CSA 6.25-M97 






ANSI Z21. 86-2000 
CSA 2.32-2000 


Vented Gas-Fired Space-Heating Appliances 


Appliances 






ANSI Z124.1-95 


Plastic Bathtub Units 


Fixtures 


ANSI Z124.2-95 


Plastic Shower Units 


Fixtures 


ANSI Z124.3-95 


Plastic Lavatories 


Fixtures 


ANSI Z124.4-96 


Plastic Water Closet Bowls and Tanks 


Fixtures 


ANSI Z124.5-97 


Plastic Toilet (Water Closet) Seats 


Fixtures 


ANSI Z124.6-97 


Plastic SinJks 


Fixtures 


ANSI Z124.7-97 


Prefabricated Plastic Spa Shells 


Fixtures 


ANSI Z124.8-90 


Plastic Bathtub Liners 


Fixtures 


ANSI Z124.9-94 


Plastic Urinal Fixtures (Note 1) 


Fixtures 


ANSI Z773.1-99 


National Fuel Gas Code (same as NFPA 54) 


Fuel Gas 


ANSI Z358.1-98 


Emergency Eyewash and Shower Equipment 


Miscellaneous 


ARI 1010-94 


Drinking Fountains and Self-Contained, 

Mechanically Refrigerated Drinking Water Coolers 


Appliances 


1 ASHRAE 90.1-2001 


Energy Standard for Buildings Except Low-Rise 
Residential Buildings 


Miscellaneous 


ASME A112.1.2-96 


Air Gaps in Plumbing Systems 


Piping 


1 ASME A112.1.3-2000 


Air Gap Fittings for Use with Plvunbtng Fixtures, Appliances, 






and Appurtenances 


Fixtures 



212 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


ASME A112.3.1-93 


Stainless Steel Drainage Systems for Sanitary, Storm, and 
Chemical Applications, Above and Below Ground (Note 1) 


Piping, Ferrous 


1 ASME Al 12.3.4-2000 


Macerating Toilet Systems and Related Components 


Fixtures 


ASMEA112.4.1-93(R98) 


Water Heater Relief Valve Drain Tubes 


Appliances 


1 ASME A112.4.3-99 


Plastic Fittings for Connecting Water Closets to the 
Sanitary Drainage System 


Piping 


ASME A112.6.1M-97 


Floor- Affixed Supports for Off-the-Floor Plumbing Fixtures 
for Public Use 


Fixtures 


ASME Al 12.6.2-2000 


Framing- Affixed Supports for Off-the-Floor Plumbing 






Fixtures 


Fixtures 


ASME Al 12. 14.3-2001 


Grease Interceptors 


Fixtures 


ASME A112.14.4-2001 


Grease Recovery Devices 


Fixtures 


ASMEA112.18.1M-2000 


Plumbing Fixture Fittings 


Valves 


ASME A112.18.3-96 


Backflow Protection Devices and Systems in 
Plumbing Fixture 


Kitchen, Lavatory, and 
Shower Fittings with 
Attached Hose Outlets 


ASME A112.18.6-99 


Flexible Water Connectors 


Piping 


ASME A112.18.7-99 


Deck Mounted Bath /Shower Transfer Valves with 






Integral Backflow Protection 


Valves 


ASME A112.19.1M-94 
1 (R99) 


Enameled Cast-iron Plumbing Fixtures 
(Supplement 1-1998) 


Fixtures 


ASME A112.19.2M-98 


Vitreous China Plumbing Fixtures 


Fixtures 


1 ASME A112.19.3M-2000 


Stainless Steel Plumbing Fixtures (Designed for 
Residential Use) 


Fixtures 


ASME A112.19.4M-94 
(R99) 


Porcelain-Enameled Formed Steel Plumbing Fixtures 
(Supplement 1-1998) 


Fixtures 


ASME A112.19.5-99 


Trim for Water-Closet Bowls, Tanks, and Urinals 


Fixtures 


ASME A112.19.6-95 


Hydraulic Performance Requirements for Water Closets 
and Urinals 


Fixtures 


ASME A112.19.7M-95 


Whirlpool Bathtub Appliances 


Fixtures 


ASME A112.19.8M-87 
1 (R96) 


Suction Fittings for Use in Swimming Pools, Wading 

Pools, Spas, Hot Tubs, and Whirlpool Bathtub Appliances 


Swimming Pools 
and Spas 


ASME A112.19.9M-91 (R98) 


Non- Vitreous Ceramic Plumbing Fixtures 


Fixtures 


ASME A112.19.12-2000 


Wall Mounted and Pedestal Mounted Adjustable and Pivoting 






Lavatory and Sink Carrier System 


Fixtures 


ASME A112.21.1M-91[D] 


Floor Drains (Note 1) (replaced by ASME A112.6.3) 


DWV Components 


ASME A112.21.3M-85 (ROl) 


Hydrants for Utility and Maintenance Use (Note 1) 


Valves 


ASME A112.26.1M-84[D] 


Water Hammer Arresters (cancelled) 


Piping 



213 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


ASME A112.36.2M-91 (R98) 


Cleanouts (Note 1) 


DWV Components 


ASME Bl.20.1-83 (R92) 


Pipe Threads, General Purpose, Inch 


Joints 


ASME Bl. 20.3-76 
(R82/91/98) 


Dryseal Pipe Threads, Inch 


Joints 


ASME B16.1-89 


Cast-iron Pipe Flanges and Flanged Fittings, Classes 25, 
125, 250, and 800 


Piping, Ferrous 


ASME B16.3-99 


Malleable-Iron Threaded Fittings 


Piping, Ferrous 


ASME B16.4-98 


Gray Iron Threaded Fittings (Includes Revision Services) 


Piping, Ferrous 


ASME B16.5-96 


Pipe Flanges and Flanged Fittings 


Joints 


ASME B16.12-98 


Iron Threaded Drainage Fittings (Note 1) 


Piping, Ferrous 


ASME B16.15-85 (R94) 


Cast Bronze Threaded Fittings, Classes 125 and 250 


Piping, Copper Alloy 


ASME B16.18-84 


Cast Copper Alloy Solder Joint Pressure Fittings (Note 1) 


Piping, Copper Alloy 


ASME B16.21-92 


Nonmetallic Flat Gaskets for Pipe Flanges 


Joints 


ASME B16.22-95 


Wrought Copper and Copper Alloy Solder Joint Pressure 
Fittings Alloy 


Piping, Copper Alloy 


ASME B16.23-92 


Cast Copper Alloy Solder Joint Drainage Fittings - DWV Alloy 


Piping, Copper Alloy 


1 ASME B16.24-2002 


Cast Copper Alloy Pipe Flanges and Flanged Fittings Alloy 


Piping, Copper Alloy 


ASME B16.26-88 


Cast Copper Alloy Fittings for Flared Copper Tubes Alloy 


Piping, Copper Alloy 


1 ASME B16.29-2002 


Wrought Copper and Wrought Copper Alloy Solder Joint 
Drainage Fittings-DWV Alloy (Note 1) 


Piping, Copper Alloy 


ASME B16.32-92 


Cast Copper Alloy Solder Joint Fittings for Solvent Drainage 
Systems Alloy 


Piping, Copper Alloy 


ASME B16.33-90 


Manually Operated Metallic Gas Valves for Use in Gas 
Piping Systems up to 125 psig 


Valves 


1 ASME B16.34-96 


Valves - Flanged, Threaded, and Welding End 


Valves 


ASME B16.38-85 


Large Metallic Valves for Gas Distribution (Manually 
Operated, NPS 2-1 /2 to 12, 125 psig Maximum) 


Valves 


1 ASME B16.39-98 


Pipe Unions, Malleable Iron Threaded (Includes Revision 
Services) 


Piping, Ferrous 


ASME B16.47-96 


Large Diameter Steel Flanges 


Piping, Ferrous 


ASME B36.10M-2000 


Welded and Seamless Wrought Steel Pipe 


Piping, Ferrous 


ASME Section IX 


Welding and Brazing Procedures, Welders, Brazers, and 
Welding and Brazing Operators 


Certification 


ASSE 1001-90 


Pipe Applied Atmospheric-Type Vacuum Breakers 


Backflow Protection 


ASSE 1002-99 


Anti-Siphon Fill Valves (Ballcocks) for Water Closet Flush 






Tank 


Backflow Protection 


ASSE 1003-2001 


Water Pressure Reducing Valves 


Valves 



214 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


ASSE 1004-90 


Backflow Prevention Requirements for Commercial 
Dishwashing Machines 


Backflow Protection 


ASSE 1006-89 


Residential Use Dishwashers 


Appliances 


ASSE 1007-92 


Home Laundry Equipment 


Appliances 


ASSE 1008-89 


Household Food Waste Disposer Units 


Appliances 


ASSE 1009-90 


Commercial Food Waste Grinder Units 


Appliances 


ASSE 1010-98 


Water Hammer Arresters 


Piping 


ASSE 1011-95 


Hose-Connection Vacuum Breakers 


Backflow Protection 


ASSE 1013-99 


Reduced Pressure Principle Backflow Preventers and Reduced 
Pressure Fire Protection Principle Backflow Preventers 


Backflow Protection 


ASSE 1014-90 


Hand-Held Showers 


Fixtures 


ASSE 1015-99 


Double-Check Backflow Prevention Assembly 


Backflow Protection 


ASSE 1016-96 


Individual, Thermostatic Pressure Balancing and 






Combination Pressure Balancing and Thermostatic 
Control Valves for Individual Fixtures Fittings 


Valves 


ASSE 1017-98 


Temperature Actuated 






Mixing Valves for Hot Water Distribution Systems 


Valves 


ASSE 1018-2001 


Trap Seal Primer Valves, Water Supply Fed 


Valves 


ASSE 1019-97 


Vacuum Breaker Wall Hydrant, Freeze-Resistant 






Automatic Draining Type 


Backflow Protection 


ASSE 1020-98 


Pressure Vacuum Breaker Assembly 


Backflow Protection 


ASSE 1021-2001 


Drains Air Gaps for Domestic Dishwasher Applications 


Backflow Protection 


ASSE 1023-79 


Hot Water Dispensers, Household Storage Type, Electrical 


Appliances 


ASSE 1025-78 


Diverters for Plumbing Faucets with Hose Spray, 
Anti-Siphon Type, Residential Applications 


Valves 


ASSE 1028-81 [D] 


Automatic Flow Controllers (discontinued) 


Valves 


ASSE 1032-80 


Dual Check Valve Type Backflow Preventers for Carbonated 
Beverage Dispensers - Post Mix Types 


Backflow Protection 


ASSE 1034-81 [D] 


Fixed Flow Restrictors (discontinued) 


Piping 


ASSE 1035-95 


Laboratory Faucet Backflow Preventer 


Backflow Protection 


ASSE 1037-90 


Pressurized Flushing Devices (Flushometers) for Plumbing 
Fixtures 


Backflow Protection 


ASSE 1047-99 


Reduced Pressure Detector Fire Protection Backflow 






Prevention Assemblies 


Backflow Protection 


ASSE 1052-94 


Hose Cormection Backflow Preventers 


Backflow Protection 


ASSE 1055-97 


Chemical Dispensing Systems 


Backflow Protection 



215 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


ASSE 1056-2001 


Spill Resistant Vacuum Breakers 


Backflow Protection 


ASSE 1062-97 


Temperature Actuated Flow Reduction (TAFR) Valves for 
Individual Fixture Fittings 


Valves 


ASSE 1066-97 


Individual Pressure Balancing In-Line Valves for Individual 
Fixture Fittings (Note 9) 


Valves 


ASSE Series 5000-98 


Professional Qualification Standard for Backflow Prevention 
Assembly Testers, Repairers, and Surveyors 


Backflow Protection 


ASSE 6000-98 


Medical Gas Systems Installers, Inspectors, and Verifiers 


Certification 


ASTM A 47-99 


Ferritic Malleable Iron Castings 


Piping, Ferrous 


ASTM A 53-2001 


Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded, 
and Seamless 


Piping, Ferrous 


ASTM A 74-98 


Cast-iron Soil Pipe and Fittings (Note 1) 


Piping, Ferrous 


ASTM A 126-95(R01) 


Gray Iron Castings for Valves, Flanges, and Pipe Fittings 


Piping, Ferrous 


ASTM A 197M-2000 


Cupola Malleable Iron (Metric) 


Piping, Ferrous 


ASTM A 312-2001a 


Seamless and Welded Austenitic Stainless Steel Pipes 


Piping, Ferrous 


ASTM A 377-99 


Ductile-Iron Pressure Pipe 


Piping, Ferrous 


ASTM A 518-99 


Corrosion-Resistant High-Silicon Iron Castings (Metric) 


Piping, Ferrous 


ASTM A 536-84(R-99^') 


Ductile Iron Castings 


Piping, Ferrous 


ASTM A 653M-2001a 


Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron 
Alloy-Coated (Galvannealed) by the Hot-Dip Process 


Piping, Ferrous 


1 ASTM A 733-2001 


Welded and Seamless Carbon Steel and Austenitic 
Stainless Steel Pipe Nipples 


Piping, Ferrous 


ASTM A 861-2001a 


High-Silicon Iron Pipe and Fittings (Note 1) 


Piping, Ferrous 


ASTM A 888-98'' 


Hubless Cast-Iron Soil Pipe and Fittings for Sanitary and 






Storm Drain Waste and Vent Piping Applications 


Piping, Ferrous 


ASTM B 29-92(R97) 


Refined Lead 


Joints 


ASTM B 32-96 


Solder Metal (Note 4) 


Joints 


ASTM B 42-98 


Seamless Copper Pipe, Standard Sizes 


Piping, Copper Alloy 


ASTM B 43-98 


Seamless Red Brass Pipe, Standard Sizes 


Piping, Copper Alloy 


ASTM B 75-99 


Seamless Copper Tube 


Piping, Copper Alloy 


ASTM B 88-99=' 


Seamless Copper Water Tube 


Piping, Copper Alloy 


ASTM B 135-2000 


Seamless Brass Tube (Metric) 


Piping, Copper Alloy 


ASTM B 152-2000 


Copper Sheet, Strip, Plate, and Rolled Bar 


Miscellaneous 


ASTM B 251-97 


General Requirements for Wrought Seamless Copper 
Copper- Alloy Tube 


Piping, Copper Alloy 



216 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


1 ASTM B 280-99"=^ 


Seamless Copper Tube for Air Conditioning and Refrigeration 






Field Service 


Piping, Copper Alloy 


ASTM B 302-2000 


Threadless Copper Pipe, Standard Sizes 


Piping, Copper Alloy 


ASTM B 306-99 


Copper Drainage Tube (DWV) 


Piping, Copper Alloy 


ASTM B 370-98 


Copper Sheet and Strip for Building Construction 


Miscellaneous 


ASTM B 447-2000 


Welded Copper Tube 


Piping, Copper Alloy 


ASTM B 584-2000 


Copper Alloy Sand Casting for General Applications (Note 5) 


Piping, Copper Alloy 


ASTM B 587-97-=^ 


Welded Brass Tube 


Piping, Copper Alloy 


ASTM B 641-93[D] 


Seamless and Welded Copper Distribution Tube (Type D) 
(discontinued) 


Piping, Copper Alloy 


ASTM B 642-88[D] 


Welded Copper Alloy UNS C21000 Water Tube 
(discontinued 1994) 


Piping, Copper Alloy 


1 ASTM B 687-99 


Brass, Copper, and Chromium-Plated Pipe Nipples 


Piping, Copper Alloy 


ASTM B 716-93[D] 


Welded Copper Water Tube (discontinued 1994) 


Piping, Copper Alloy 


1 ASTM B 813-2000=^ 


Liquid and Paste Fluxes for Soldering Applications of 
Copper and Copper Alloy Tube 


Joints 


ASTM B 819-2000 


Seamless Copper Tube for Medical Gas Systems 


Piping, Copper Alloy 


ASTM B 828-2000 


Making Capillary Joints by Soldering of Copper and 
Copper Alloy Tube and Fittings 


Joints 


ASTM C 14-99 


Concrete Sewer, Storm Drain, and Culvert Pipe 


Piping, Non-Metallic 


ASTM C 296-2000 


Asbestos-Cement Pressure Pipe 


Piping, Non-Metallic 


ASTM C 412-99 


Concrete Drain Tile 


Piping, Non-Metallic 


ASTM C 425-2002 


Compression Joints for Vitrified Clay Pipe and Fittings 


Joints 


ASTM C 428-97(R02) 


Asbestos-Cement Nonpressure Sewer Pipe (Notes 6 and 7) 


Piping, Non-Metallic 


ASTM C 443-2001 


Joints for Circular Concrete Sewer and Culvert Pipe, 
Using Rubber Gaskets 


Joints 


ASTM C 478-97 


Precast Reinforced Concrete Manhole Sections 


Miscellaneous 


ASTM C 564-97 


Rubber Gaskets for Cast-iron Soil Pipe and Fittings (Note 1) 


Joints 


ASTM C 700-2002 


Vitrified Clay Pipe, Extra Strength, Standard Strength, 
and Perforated 


Piping, Non-Metallic 


1 ASTM C 1053-2000 


Borosilicate Glass Pipe and Fittings for Drain, Waste, 
and Vent (DWV) Applications (Note 1) 


Piping, Non-Metallic 


1 ASTM C 1173-97 


Flexible Transition Couplings for Underground 
Piping Systems 


Joints 


1 ASTM C 1277-97 


Shielded Couplings Joining Hubless Cast-iron Soil 
Pipe and Fittings 


Piping, Ferrous 



217 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


ASTM C 1440-99^' 


Thermoplastic Elastomeric (TPE) Gasket Materials for Drain, 
Waste, and Vent (DWV), Sewer, Sanitary and Storm 
Plumbing Systems 


Piping, Plastic 


ASTM C 1460-2000 


Shielded Transition Couplings for Use with Dissimilar DWV 






Pipe and Fittings Above Ground 


Piping, Plastic 


ASTM C 1461-2000 


Mechanical Couplings Using Thermoplastic Elastomeric 
(TPE) Gaskets for Joining Drain, Waste, and Vent (DWV); 
Sewer; Sanitary; and Storm Plumbing Systems for Above 






and Below Ground 


Piping, Plastic 


ASTM D 396-2001 


Specification for Fuel Oil 


Miscellaneous 


ASTM D 1527-99 


Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe, 






Sch. 40 and 80 


Piping, Plastic 


ASTM D 1785-99 


Poly(Vinyl Chloride) (PVC) Plastic Pipe, Sch. 40, 80, and 120 


Piping, Plastic 


ASTM D 1869-95(R00) 


Rubber O-rings for Asbestos-Cement Pipe 


Joints 


ASTM D 2104-2001 


Polyethylene (PE) Plastic Pipe, Sch. 40 


Piping, Plastic 


ASTM D 2146-82[D] 


Polypropylene Plastic Molding and Extrusion Materials 
(replaced by ASTM D 4101) 


Piping, Plastic 


1 ASTM D 2235-2001 


Solvent Cement for Acrylonitrile-Butadiene-Styrene (ABS) 
Plastic Pipe and Fittings 


Joints 


1 ASTM D 2239-2001 


Polyethylene (PE) Plastic Pipe, (SDK-PR) Based on 
Controlled Inside Diameter 


Piping, Plastic 


1 ASTM D 2241-2000 


Poly(Vinyl Chloride)(PVC) Pressure-Rated Pipe (SDR Series) 


Piping, Plastic 


ASTM D 2282-99 


Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe (SDR-PR) 


Piping, Plastic 


ASTM D 2321-2000 


Underground Installation of Thermoplastic Pipe for Sewers 
and Other Gravity-Flow Applications 


Piping, Plastic 


1 ASTM D 2447-2001 


Polyethylene (PE) Plastic Pipe, Sch. 40 and 80 (Based on 
Controlled Outside Diameter) 


Piping, Plastic 


1 ASTM D 2464-99 


Threaded Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, 
Sch. 80 (Note 1) 


Piping, Plastic 


ASTMD2465-73[D] 


Threaded Acrylonitrile-Butadiene-Styrene (ABS) Plastic 
Pipe Fittings, Schedule 80 (discontinued 1986) 


Piping, Plastic 


1 ASTM D 2466-2001 


Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Sch. 40 
(Note 1) 


Piping, Plastic 


1 ASTM D 2467-2001 


Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Sch, 80 
(Note 1) 


Piping, Plastic 


ASTM D 2468-96a 


Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe 
Fittings (Sch. 40) 


Piping, Plastic 


ASTM D 2469-76[D] 


Socket-Type Acrylonitrile-Butadiene-Styrene (ABS) 
Plastic Pipe Fittings, Schedule 80 (discontinued 1986) 


Piping, Plastic 



218 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


ASTM D 2513-2001a 


Thermoplastic Gas Pressure Pipe Tubirig and Fittings (Note 1) 


Piping, Plastic 


ASTMD 2517-2000 


Reinforced Epoxy Resin Gas Pressure Pipe and Fittings 


Piping, Plastic 


ASTM D 2564-96a 


Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic 
Piping Systems 


Joints 


1 ASTM D 2609-2000 


Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe (Note 1) 


Piping, Plastic 


ASTM D 2657-97 


Practice for Heating Fusion Joining of Polyolefin Pipe 
Fittings (Note 1) 


Joints 


1 ASTM D 2661-2001 


Acrylonitrile-Butadiene-Styrene (ABS) Sch.40 Plastic 
Drain, Waste, and Vent Pipe and Fittings (Note 1) 


Piping, Plastic 


1 ASTM D 2665-2001 


Poly(Vinyl Chloride) (PVC) Plastic Drain, Waste, and 
Vent Pipe and Fittings 


Pipijig, Plastic 


ASTM D 2672-96a 


Joints for IPS PVC Pipe Using Solvent Cement 


Joints 


1 ASTM D 2680-2001 


Acrylonitrile-Butadiene-Styrene (ABS) and Poly(Vinyl 
Chloride) (PVC) Composite Sewer Piping 


Piping, Plastic 


ASTM D 2729-96a 


Poly (Vinyl Chloride) (PVC) Sewer Pipe and Fittings (Note 1) 


Piping, Plastic 


ASTM D 2737-2001 


Polyethylene (PE) Plastic Tubing 


Piping, Plastic 


ASTM D 2740-89'HD] 


Poly(Vinyl Chloride) (PVC) Plastic Tubing (discontinued 1991) 


Piping, Plastic 


1 ASTM D 2751-96a 


Acrylonitrile-Butadiene-Styrene (ABS) Sewer Pipe 
and Fittings (Note 1) 


Piping, Plastic 


1 ASTM D 2846-99 


Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot- and 
Cold- Water Distribution Systems 


Pipiiig, Plastic 


ASTM D 2855-96 


Making Solvent-Cemented Joints with Poly(Vinyl Chloride) 
(PVC) Pipe and Fittings 


Joints 


1 ASTM D 2996-2001 


Filament- Wound Fiberglass (Glass-Fiber-Reinforced 
Thermosetting Resin) Pipe 


Piping, Plastic 


ASTM D 3033-85[D] 


Type PSP Poly(Vinyl Chloride) (PVC) Sewer Pipe 
and Fittings (discontinued 1989) 


Piping, Plastic 


ASTM D 3034-2001 


Type PSM Poly(Vinyl Chloride) (PVC) Sewer Pipe and Fittings 


Piping, Plastic 


ASTM D 3035-2001 


Polyethylene(PE) Plastic Pipe (DR-PR) (Based on Controlled 






Outside Diameter) 


Piping, Plastic 


ASTM D 3036-73[D] 


Poly(Vinyl Chloride) (PVC) Plastic Line Couplings 
(discontinued 1986) 


Piping, Plastic 


ASTM D 3122-95 


Solvent Cements for Styrene-Rubber (SR) Plastic Pipe 
and Fittings 


Joints 


ASTM D 3138-95 


Solvent Cements for Transition Joints, Acrylonitrile-Butadiene- 
Styrene (ABS) and Poly(Vinyl Chloride (PVC) 
Non-Pressure Piping Components 


Joints 


ASTM D 3139-98 


Joints for Plastic Pressure Pipes Using Flexible Elastomeric 
Seals 


Joints 



219 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


1 ASTMD3140-90[D] 


Flaring Polyolefin Pipe and Tubing (discontinued) 


Joints 


ASTMD3212-96a 


Joints for Drain and Sewer Plastic Pipes Using Flexible 
Elastomeric Seals 


Joints 


ASTMD 3298-81 [D] 


Perforated Styrene-Rubber (SR) Plastic Drain Pipe 
(discontinued 1989) 


Piping, Plastic 


ASTMD 3311-94 


Drain, Waste, and Vent (DWV) Plastic Fittings 
Patterns (Note 1) 


Piping, Plastic 


ASTM D 3965-99 


Rigid Acrylonitrile-Butadiene-Styrene (ABS) 
Materials for Pipe and Fittings 


Piping, Plastic 


ASTM D 4068-2001 


Chlorinated Polyethylene (CPE) Sheeting for Concealed 
Water-Containment Membrane 


Fixtures 


ASTM D 4101-2002 


Propylene Plastic Injection and Extrusion Materials 


Miscellaneous 


ASTMD 4551-96 (ROl) 


Poly(Vinyl Chloride) (PVC) Plastic Flexible Concealed 






Water-Containment Membrane 


Fixtures 


ASTMD 6104-97 


Determining the Performance of Oil /Water Separators 






Subjected to Surface Run-Off 


Fixtures 


ASTM E 84-2001 


Surface Burrang Characteristics of Building Materials 


Miscellaneous 


1 ASTME119-2000a 


Fire Tests of Building Construction and Materials 


Miscellaneous 


1 ASTM E 814-2000 


Fire Tests of Through-Penetration Fire Stops 


Miscellaneous 


1 ASTM F 402-98 (R99) 


Safe Handling of Solvent Cements, Primers, and Cleaners 






Used for Joining Thermoplastic Pipe and Fittings 


Joints 


ASTM F 405-98 


Corrugated polyethylene (PE) Tubing and Fittings 


Piping, Plastic 


ASTM F 409-99a 


Thermoplastic Accessible and Replaceable Plastic Tube 
and Tubular Fittings (Note 1) 


Piping, Plastic 


1 ASTM F 437-99 


Threaded Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic 
Pipe Fittings, Sch. 80 


Piping, Plastic 


1 ASTM F 438-2001 


Socket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) 
Plastic Pipe Fittings, Sch. 40 


Piping, Plastic 


1 ASTM F 439-2001 


Socket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) 
Plastic Pipe Fittings, Sch. 80 


Piping, Plastic 


1 ASTM F 441-99 


Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Pipe, 
Sch. 40 and 80 


Piping, Plastic 


1 ASTM F 442-99 


Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Pipe 
(SDR-PR) 


Piping, Plastic 


1 ASTM F 443-77^'[D] 


Bell-End Chlorinated Poly(Vinyl Chloride) (CPVC) Pipe, 
Schedule 40 (discontinued 1987) 


Piping, Plastic 


1 ASTM F 480-2000 


Thermoplastic Well Casing Pipe and Couplings Made in 
Standard Dimension Ratios (SDR) Schedule 40 and Schedule 80 


Piping, Plastic 



220 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


ASTM F 493-97 


Solvent Cements for Chlorinated Poly(Vinyl Chloride) 
(CPVC) Plastic Pipe and Fittings 


Joints 


1 ASTM F 628-2001 


Acrylonitrile-Butadiene-Styrene (ABS) Sch. 40 Plastic Drain, 
Waste, and Vent Pipe with a Cellular Core, (Note 1) 


Piping, Plastic 


ASTM F 656-96a 


Primers for Use in Solvent Cement Joints of 

Poly(Vinyl Chloride) (PVC) Plastic Pipe and Fittings 


Joints 


ASTM F 667-97 


Large Diameter Corrugated Polyethylene Tubing and Fittings 


Piping, Plastic 


ASTM F 714-2001 


Polyethylene (PE) Plastic Pipe (SDR-PR) (Based on Outside 






Diameter) 


Piping, Plastic 


ASTM F 789-95a 


Type PS-46 and Type PS-115 Poly(Vinyl Chloride) (PVC) 
Plastic Gravity Flow Sewer Pipe and Fittings (Note 1) 


Piping, Plastic 


1 ASTM F 794-2001 


Poly(Vinyl Chloride) (PVC) Profile Gravity Sewer Pipe 
and Fittings Based on Controlled Inside Diameter 


Piping, Plastic 


1 ASTM F 810-2001 


Smoothwall Polyethylene (PE) Pipe for Use in Drainage and 
Waste Disposal Absorption Fields 


Piping, Plastic 


ASTM F 876-2001'' 


Crosslinked Polyethylene (PEX) Tubing 


Piping, Plastic 


ASTM F 877-2001^' 


Crosslinked Polyethylene (PEX) Plastic Hot- and 
Cold-Water Distribution Systems 


Piping, Plastic 


1 ASTM F 891-2000 


Coextruded Poly(Vinyl Chloride) (PVC) Plastic Pipe with a 
Cellular Core 


Piping, Plastic 


1 ASTM F 949-2001a 


Poly(VinyI Chloride) (PVC) Corrugated Sewer Pipe with a 
Smooth Interior and Fittings 


Piping, Plastic 


1 ASTM F 1216-98 


Rehabilitation of Existing Pipelines and Conduits by the 
Inversion and Curing of a Resin-Impregnated Tube 


Piping, Plastic 


1 ASTM F 1281-2001a 


Crosslinked Polyethylene / Aluminum / Crosslinked 
Polyethylene (PEX-Al-PEX) Pressure Pipe 


Piping, Plastic 


1 ASTM F 1282-2001a 


Polyethylene / Aluminum / Polyethylene (PE-Al-PE) 
Composite Pressure Pipe 


Piping, Plastic 


1 ASTM F 1412-2001 


Polyolefin Pipe and Fittings for Corrosive Waste Drainage 
Systems 


Piping, Plastic 


ASTM F 1673-95 


Polyvinylidene Fluoride (PVDF) Corrosive Waste 
Drainage Systems 


Piping, Plastic 


ASTM F 1743-96 


Rehabilitation of Existing Pipelines and Conduits by 

PuUed-in-Place Installation of Cured-in-Place Thermosetting 
Resin Pipe (CIPP) 


Piping, Plastic 


1 ASTM F 1807-99 


Metal Insert Fittings with Copper Crimp Ring for SDR 9 
Crosslinked Polyethylene (PEX) Tubing 


Piping, Plastic 


ASTM F 1866-98 


Poly(Vinyl Chloride) (PVC) Drainage and DWV 
Fabricated Fittings, Schedule 40 


Piping, Plastic 


ASTM F 1924-2001 


Plastic Mechanical Fitting for Use on Outside Diameter 






Controlled Polyethylene Gas Distribution Pipe and Tubing 


Piping, Plastic 



221 



Table 14-1 



UNIFORM PLUMBING CODE 



-*l 



Standard Number 


Standard Title 


Application 


ASTM F 1948-99a 


Metallic Mechanical Fittings for Use on Outside Diameter 






Controlled Thermoplastic Gas Distiibution Pipe and Tubing 


Piping, Plastic 


ASTM F 1960-2000=' 


Cold Expansion Fittings with PEX Reinforcing Rings for Use 
with Cross-Linked Polyethylene (PEX) Tubing 


Piping, Plastic 


ASTM F 1961-99 


Metal Cold Flare Compression Fittings with Disc Springs 
for Crosslinked Polyethylene (PEX) Tubing 


Piping, Plastic 


ASTM F 1970-2001 


Special Engineered Fittings or Appurtenances for Use in Poly 
(Vinyl Chloride) (PVC) or Chlorinated Poly(Vinyl Chloride) 
(CPVC) Systems 


Piping, Plastic 


ASTM F 1973-99^' 


Factory Assembled Anodeless Riser and Transition Fitting 
in Polyethylene (PE) Fuel Gas Distribution Systems 


Piping, Plastic 


1 ASTM F 1974-2000=' 


Metal Insert Fittings for Polyethylene/ Altravinvtm/ Polyethylene 
and Crosslinked Polyethylene /Aluminum /Crosslinked 
Polyethylene Composite Pressure Pipe 


Piping, Plastic 


1 ASTM F 2080-2001 


Cold-Expansion Fittings With Metal Compression Sleeves 
for Cross-Linked Polyethylene (PEX) Pipe 


Piping, Plastic 


AWS A5.8-92 


Filler Metals for Brazing and Braze Welding 


Joints 


AWS B2.2-91 


Brazing Procedure and Performance Qualification 


Certification 


1 AWWACllO-98 


Ductile-Iron and Gray-Iron Fittings, 3 in. through 48 in. 
(75 mm through 1200 nmi), for Water and Other Liquids 
(same as ANSI A21. 10-98) 


Piping, Ferrous 


AWWA Clll-2000 


Rubber-Gasket Joints for Ductile-Iron Pressure Pipe 
and Fittings (same as ANSI A21. 11-00) 


Piping, Ferrous 


AWWA C151-96 


Ductile-Iron Pipe, Centrifugally Cast, for Water 
(same as ANSI A21.51-91) 


Piping, Ferrous 


1 AWWA C153-2000 


Ductile-Iron Compact Fittings, 3 in. through 24 in. (76 mm 
through 610 mm) and 54 in. through 64 in. (1400 mm 
through 1600 mm), for Water Service 
(same as ANSI A21. 53-00) 


Piping, Ferrous 


1 AWWAC203-91a 


Coal-Tar Protective Coatings and Linings for Steel Water 
Pipelines - Enameled and Tape - Hot Applied 


Piping 


1 AWWA C213-2001 


Fusion-Bonded Epoxy Coating for the Interior and Exterior of 
Steel Water Pipelines 


Piping, Ferrous 


1 AWWAC215-99 


Extruded Polyolefin Coatings for the Exterior of Steel Water 
Pipelines 


Piping, Ferrous 


AWWA C400-93 


Asbestos-Cement Distribution Pipe, 4 in. through 16 in. 
(100 mm through 400 mm) for Water Distiibution Systems 


Piping, Non-Metallic 


AWWA C500-93 


Gate Valves for Water and Sewerage Systems Valves 


Valves 


AWWA C504-2000 


Rubber-Seated Butterfly Valves 


Valves 


AWWA C507-99 


Ball Valves, 6 in. through 48 in. (150 mm through 1200 mm) 


Valves 



222 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


AWWA C510-97 


Double Check Valve Backflow-Prevention Assembly 


Backflow Protection 


AWWA C511-97 


Reduced-Pressure Principle Backflow-Prevention Assemblies 


Backflow Protection 


AWWA C606-97 


Grooved- and Shouldered-Type Joints 


Joints 


AWWA C900-97 


Poly(vinyl Chloride) (PVC) Pressure Pipe, 4 in. through 12 in., 
for Water Distribution 


Piping, Plastic 


1 AWWA C901-97 


Polyethylene (PE) Pressure Pipe and Tubing, 1 /2 in. (13 mm) 
through 3 in. (76 mm), for Water Service 


Piping, Plastic 


1 AWWA C902-96 


Polybutylene (PB) Pipe, Tubing, and Fittings, 1/2 in. Through 
3 in., for Water 


Piping, Plastic 


\ CISPI 301-2000 


Hubless Cast-iron Soil Pipe and Fittings for Sanitary and 
Storm Drain, Waste, and Vent Piping Applications (Note 1) 


Piping, Ferrous 


1 CISPI HSN-85[D] 


Neoprene Rubber Gaskets for Hub and Spigot Cast- 
iron Soil Pipe and Fittings (discontinued) 


Joints 


CISPI 310-97 


Couplings for Use in Cormection with Hubless Cast-iron Soil 
Pipe and Fittings for Sanitary and Storm Drain, Waste, and 
Vent Piping Applications 


Joints 


1 CSA 3-92 


U.S. Requirements for Excess Flow Valves 


Valves 


FS A-A-51145C 


Flux, Soldering, Non-Electronic, Paste, and Liquid 


Joints 


FS K65.59-71 


Acrylonitrile-Butadiene-Styrene (ABS) Sewer Pipe and Fittings 


Piping, Plastic 


FSM265-811 


Acrylonitrile-Butadiene-Styrene (ABS) Sch. 40 Plastic Drain, 
Waste, and Vent Pipe and Fittings 


Piping, Plastic 


FS 0-F-499D-85 


Flux Brazing 


Joints 


FS O-F-506C-72[D] 


Flux, Soldering (discontinued) 


Joints 


FS OO-L-201 f-70 


Shower Pans-Sheet Lead, Grade B (4 lb. min.) 


Miscellaneous 


FS QQ-R-571C-69[D] 


Copper and Nickel Alloys (Rods) (discontinued) 


Miscellaneous 


FS TT-S-1732-71[D] 


Seal Compound Pipe Joint and Thread (discontinued) 


Joints 


FS WW-P 325B-76 


Lead Pipe and Bends 


Piping 


FS WW-P-541-E- 


Plumbing Fixtures, General Specification 


Fixtures 


Gen. 1980 






FS WW-U-516A-74(b) 


Copper Alloy (Bronze) Unions 


Piping, Copper Alloy 


FS WW-V-54d[D] 


Valve, Gate, Bronze (125, 150, and 200 lb.. Screwed 
Flange, Solder-End, for Land Use) (discontinued) 


Valves 


FS WW-V-58b 


Valves, Gate, Cast Iron (125 and 250 lb). Screwed and 
Flanged (for Land Use) 


Valves 


lAPMO PS l-2000a 


Prefabricated Septic Tanks 


DWV Components 


lAPMO PS 2-2000a 


Cast Brass and Tubing P-Traps 


Piping, Copper Alloy 



223 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 



Standard Title 



Application 



I lAPMO PS 4-2000el 
lAPMO PS 7-84 
lAPMO PS 9-84 
lAPMO PS 14-99 

I lAPMO PS 16-2000 
lAPMO PS 23-89 
lAPMO PS 25-84 

lAPMO PS 31-95 
lAPMO PS 34-96 

lAPMO PS 36-90 
lAPMO PS 37-90 

lAPMO PS 38-99 
I lAPMO PS 40-2001 
lAPMO PS 41-99 
lAPMO PS 42-96 
lAPMO PS 43-91 
lAPMO PS 45-91 

IIAPMO PS 47-2002 
lAPMO PS 48-2000 
lAPMO PS 49-92 

lAPMO PS 50-92 

lAPMO PS 51-98 

I lAPMO PS 52-99el 

lAPMO PS 53-92 

I lAPMO PS 54-2001a 
lAPMO PS 55-92 
lAPMO PS 57-92 

lAPMO PS 58-92 



Drains for Prefabricated and Precast Showers 

Tubing Trap Wall Adapters 

Diversion Tees and Twin Waste Elbows 

Flexible Metallic Water Connectors 

Subdrains for Built-Up Shower Pans 

Dishwasher Drain Air Gaps 

Fittings for Joining Polyethylene Pipe for Water Service 
and Yard Piping 

Backflow Prevention Assemblies 

Polyethylene Encasement Sleeve for Potable Water 
Pipe and Tubing 

Lead-Free Sealing Compounds for Threaded Joints 

Black Plastic PVC or PE Pressure-Sensitive Corrosion 
Preventive Tape 

ABS and PVC Backwater Valves 

Anodeless Transition Riser for Use with PVC Gas Yard Piping 

Copper and Other Metallic Roof /Deck/Balcony Drains 

Pipe Alignment and Secondary Support Systems 

Cushioned Bathtubs and Whirlpool Bathtub Appliances 

Bathtub Three-Way Diverter Valves with Backflow Protection 

Plastic Roof Drains 

Material Safety Data Verification for Plumbing Products 

Backflow Prevention Requirements for Fixture Fittings 
with Hose Connected Singular Moveable Outlets 

Dual Flush Devices For Water Closets 

Plastic and Metallic Expansion Joints 

Sumps and Sewage Ejector Tanks 

Grooved Mechanical Pipe Couplings and Grooved End 
Fittings 

Metallic and Plastic Utility Boxes 

Bathwaste Strainer Drains 

PVC Hydraulically Actuated Diaphragm Type Water 
Control Valves 

Supports for Off-the-Floor Plumbing Fixtures With or 
Without Concealed Tanks 



Fixtures 

DWV Components 

DWV Components 

Piping 

Fixtures 

Backflow Protection 

Joints 

Backflow Protection 

Piping 
Joints 

Piping 

DWV Components 

Fuel Gas 

DWV Components 

Piping 

Fixtures 

Valves 

DWV Components 

Miscellaneous 

Backflow Protection 

Fixtures 

Joints 

DWV Components 

Joints 

Miscellaneous 

Fixtures 

Valves 

Fixtures 



224 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


lAPMO PS 59-92 


Septic Effluent and Waste Water Diverter Valves 


DWV Components 


lAPMO PS 60-96 


Sewage Holding Tank Containing Sewage Ejector Pump for 
Direct-Mounted Water Closet 


DWV Components 


lAPMO PS 61-92 


Fabricated Stainless Steel Security Water Closets 


Fixtures 


lAPMO PS 62-93[D] 


Enameled Cast-Iron Sanitary Floor Sinks (replaced 
by ASME A112.6.7) 


Fixtures 


lAPMO PS 63-99a 


Plastic Leaching Chambers 


DWV Components 


lAPMO PS 64-98 


Pipe Flashings 


Piping 


lAPMO PS 65-2000 


Air Gap Units for Water Conditioning Equipment Installation 


BacJcflow Protection 


lAPMO PS 66-2000 


Dielectric Waterway Fittings 


Piping 


lAPMO PS 67-93 


Early-Closure Replacement Flappers or Early-Closure 
Replacement Flapper With Mechanical Assemblies 


Fixtures 


lAPMO PS 69-2001 


. Plastic Bathwaste and Overflow Assemblies 


Piping, Plastic 


lAPMO PS 70-2001 


Bathtub /Whirlpool Bathtubs with Pressure Sealed Doors 


Fixtures 


lAPMO PS 71-2000[D] 


Electronic-Controlled Showers (superseded 
byASMEA112.19.15) 


Fixtures 


lAPMO PS 72-2000 


Valves with Atmospheric Vacuum Breakers 


Valves 


lAPMO PS 73-93 


Dental Vacuum Pumps 


Miscellaneous 


lAPMO PS 76-95 


Ballcock or Flushometer Valve Tailpiece Trap Primers and 
Trap Primer Receptors/ Adapters 


DWV Components 


lAPMO PS 77-99[D] 


Electrohydraulic Water Closets (replaced 
by ASME A112.19.13) 


Fixtures 


lAPMO PS 78-2001 


Dual Flush for Electrohydraulic and Gravity Water Closet 
6 Liter (1.6 Gallon) 


Fixtures 


lAPMO PS 79-95 


Multiport Electronic Trap Primer 


DWV Components 


lAPMO PS 80-95el 


Grease Interceptors and Clarifiers 


DWV Components 


lAPMO PS 81-2000 


Precast Concrete Seepage Pit Liners and Covers 


DWV Components 


lAPMO PS 82-95 


Fiberglass (Glass Fiber Reinforced Thermosetting Resin) 
Fittings 


Piping, Plastic 


lAPMO PS 83-95[D] 


Epoxy-Coated Cast-Iron Sanitary Floor Sinks (replaced 
by ASME A112.6.7) 


Fixtures 


lAPMO PS 84-95[D] 


PVC Plastic Sanitary Floor Sinks (replaced by ASME A112.6.7) 


Fixtures 


lAPMO PS 85-95 


Tools for Mechanically Formed Tee Connections in 
Copper Tubing 


Piping 


lAPMO PS 86-95 


Rainwater Diverter Valve for Non-Roofed Area Slabs 


DWV Components 


lAPMO PS 87-95 


Diverter and Shutoff Valves for Pool /Spas 


Valves 



225 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 



Standard Title 



Application 



lAPMO PS 88-95 
lAPMO PS 89-95 

lAPMO PS 90-95 
lAPMO PS 91-95 
lAPMO PS 92-95 
lAPMO PS 93-2000 
lAPMO PS 94-2001a 
lAPMO PS 95-2001 

lAPMO PS 96-96 
lAPMO PS 97-2001 
lAPMO PS 98-96 
lAPMO PS 99-96 
lAPMO PS 100-96 
lAPMO PS 101-97 
lAPMO PS 102-97 
lAPMO PS 103-97 
lAPMO PS 104-97 
lAPMO PS 105-97 
lAPMO PS 106-98 
lAPMO PS 107-98 

lAPMO PS 108-98 
lAPMO PS 110-99 
lAPMO PS 111-99 
lAPMO PS 112-99 

lAPMO PS 113-99el 
lAPMO PS 114-99el 

lAPMO PS 115-99 

lAPMO PS 116-99 
lAMPO PS 117-2001 



Pre-Pressurized Potable Water Tanks 

Soaking and Hydrotherapy (Whirlpool) Bathtubs with 
Hydraulic Seatlift 

Elastomeric Test Caps/Cleanout Caps 

Plastic Stabilizers for Use with Plastic Closet Bends 

Heat Exchangers 

Water Closet Seats with Spray 

P-Trap, Supply Stop, and Riser Insulated Protector 

Drain, Waste, and Vent Hangers and Plastic Pipe 
Support Hooks 

Passive Direct Solar Water Heaters 

Mechanical Cast-Iron Closet Flanges 

Prefabricated Fiberglass Church Baptistries 

Terrazzo Plumbing Fixtures 

Porous Filter Protector for Subdrain Weep Holes 

Suction Relief Valves 

Short Pattern Fixture Trap 

Water Heater Stands With or Without Pans 

Pressure Relief Connection for Dispensing Equipment 

Polyethylene Distribution Boxes 

Prefabricated, Tileable Shower Receptors 

Aramid-Reinf orced Rubber Hose for Use in Non-Potable 
Water Radiant Heating and Snow Melting 

Restaurant Fire Suppression Systems 

PVC Cold Water Compression Fittings 

PVC Cold Water Gripper Fittings 

PVC Plastic Valves for Cold Water Distribution Systems 
Outside a Building and CPVC Plastic Valves for Hot and 
Cold Water Distribution Systems 

Hydraulically Powered Household Food Waster Grinders 

Remote, Floor Box Industrial Water Supply, Air Supply, 
Drainage 

Demand or Automatic Activated Hot Water 
Pumping Systems 

Hot Water Circulating Devices Which Do Not Use a Pump 

Press Type Copper and Copper Alloy Fittings for 
Installation on Copper Tubing 



Miscellaneous 

Fixtures 

DWV Components 

Piping, Plastic 

Miscellaneous 

Fixtures 

Miscellaneous 

Piping 

Miscellaneous 

Piping, Ferrous 

Fixtures 

Fixtures 

DWV Components 

Valves 

DWV Components 

Appliances 

Valves 

DWV Components 

Fixtures 

Piping, Plastic 
Appliances 
Fittings 
Fittings 

Valves 
Appliances 

Miscellaneous 

Miscellaneous 
Miscellaneous 

Fittings 



226 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


lAPMO PS 118-2000 


FOG (Fats, Oils, Greases) Disposal Systems 


DWV Components 


lAMPO PS 119-2000 


Water Energized Sump Pump 


Miscellaneous 


IAS LC 1-99 


Fuel Gas Piping Systems Using Corrugated Stainless Steel 




CSA 6.26-M99 


Tubing (CSST) Fuel Gas 


Fuel Gas 


ISO Guide 65-1996 


General Requirements for Bodies Operating Product 






Certification Systems 


Certification 


MIL-F-1183 H-83[D] 


Fittings, Pipe, Cast Bronze, Silver-Brazing (discontinued) 


Piping, Copper Alloy 


MIL-F-18180C1 


Flanges and Flanged Fittings, Pipe, Steel (150, 300, 400, 
600, 900, 1500, and 2500 pounds) 


Piping, Ferrous 


1 MIL-P-17552F 


Pumps, Centrifugal, Water, Horizontal, General Service; and 
Pumps, Centrifugal Water, Horizontal, 
Boiler-Feed; Electric Motor or Steam Driven 


Pumps 


1 MIL-P-21251E 


Pumping Units, Sewage, Duplex, Automatic, Wet-Pit-Type 
(Superseded by FS A-A-50555) 


Pumps 


MIL-P-22561-82[D] 


Glass (standard cancelled per Department of Defense) 


Miscellaneous 


MIL-P-52407 


Pump, Centrifugal: Electric-Motor-Driven, Shallow 




1 (A)-1976[D] 


Well (for Water) (discontinued) 


Pumps 


MIL-P-62156 


Submersible, Axial Flow, Electric-Motor- 




(1)-1983[D] 


Driven (discontinued) 


Pumps 


MIL-P-B-81[D] 


Sewage Pumps (discontinued) 


Pumps 


SSPMA-85 






MIL-V-29193-80[D] 


Pressurized Flushing Devices (discontinued) 


Fixtures 


MSS SP-25-98 


Standard Marking System for Valves, Fittings, Flanges, and Unions 


Piping 


MSS SP-42-99 


Class 150 Corrosion-Resistant Gate-Globe, Angle, and 
Check Valves with Flanged and Butt Weld Ends 


Piping, Ferrous 


1 MSS SP-44-96 


Steel Pipeline Flanges 


Piping, Ferrous 


MSS SP-58-93 


Pipe Hangers and Supports - Materials, Design, 
and Manufacture 


Piping 


MSS SP-67-95 


Butterfly Valves 


Valves 


MSS SP-70-98 


Cast-Iron Gate Valves, Flanged and Threaded Ends 


Valves 


MSS SP-71-97 


Cast-Iron Swing Check Valves, Flanged and Threaded Ends 


Valves 


MSS SP-72-99 


Ball Valves with Flanged or Butt- Welding Ends for 
General Service 


Va;lves 


MSSSP-73-91 


Brazing Joints for Wrought and Cast Copper Alloy Solder Joint 
Pressure Fittings 


Joints 


MSS SP-78-98 


Cast-iron Plug Valves, Flanged and Threaded Ends 


Valves 


MSS SP-80-97 


Bronze Gate-Globe, Angle, and Check Valves 


Valves 


MSS SP-83-2001 


Class 300 Steel Pipe Unions Socket- Welding and Threaded 


Piping, Ferrous 


MSS SP-84 [D] 


Steel Valves - Socket- Welding Ends and Threaded 
Ends (discontinued) 


Valves 



227 



Table 14-1 



UNIFORM PLUMBING CODE 



Standard Number 


Standard Title 


Application 


1 NFPA13R-99 


Installation of Sprinkler Systems in Residential 






Occupancies up to and Including Four Stories in Height 


Miscellaneous 


1 NFPA13D-99 


Installation of Sprinkler Systems in One- and Two-Family 
Dwellings and Manufactured Homes 


Miscellaneous 


NFPA 31-2001 


Installation of Oil-Buriiing Equipment 


Miscellaneous 


NFPA 54-2002 


National Fuel Gas Code (same as ANSI Z223.1) 


Fuel Gas 


NFPA 58-2001 


Storage and Handling of Liquefied Petroleum Gases 


Fuel Gas 


NFPA 85-2001 


Boiler and Combustion Systems Hazards Code 


Appliances 


NFPA 99-2002 


Health Care Facilities 


Piping 


NFPA 99C-2002 


Gas and Vacuum Systems 


Piping 


NFPA 211-2000 


Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances 


Miscellaneous 


NSF 3-2001 


Commercial Spray-Type Dishwashing and Glasswashing 
Machines 


Appliances 


NSF 12-93 


Automatic Ice Making Equipment 


Appliances 


NSF 14-2002 


Plastic Piping Components and Related Materials 


Piping, Plastic 


NSF 18-96a 


Manual Food and Beverage Dispensing Equipment 


Appliances 


NSF 24-96 


Plumbing System Components for Manufactured Homes 
and Recreational Vehicles 


Miscellaneous 


NSF 29-93 


Chemical Feeders for Commercial Dishwashers 


Appliances 


NSF 40-2000 


Residential Wastewater Treatment Systems 


DWV Components 


NSF 41-99 


Non-Liquid Saturated Treatment Systems 


DWV Components 


NSF 42-2002 


Drinking Water Treatment Units- Aesthetic Effects 


Appliances 


NSF 44-2002 


Residential Cation Exchange Water Softeners 


Appliances 


NSF 46-2000 


Evaluation of Components and Devices Used in Wastewater 






Treatment Systems 


DWV Components 


NSF 53-2002 


Drinking Water Treatment Units-Health Effects 


Appliances 


NSF 58-2002 


Reverse-Osmosis Drinking Water Treatment Systems 


Appliances 


NSF 61-2001 


Drinking Water Systerh Components-Health Effects 


Miscellaneous 


NSF 62-99 


Water Distillation Systems 


Appliances 


NSPI 1-1991 


Public Swimming Pools 


Swimming Pools 
and Spas 


PDI G-101-85 


Testing and Rating Procedure for Grease Interceptors with 
Appendix of Sizing and Installation Data 


DWV Components 


PDI-WH 201-92 


Water Hammer Arresters 


Piping 


SAEJ1670-93 


Type F Clamps for Plumbing Applications 


Joints 


SAMA LF6a 


Medical Care Facility Brassware 


Miscellaneous 


UL 80-96 


Steel Inside Tanks for Oil-Burner Fuel 


Miscellaneous 


UL 103-95 


Factory-Built Chimneys for Residential Type and Building 
Heating Appliances 


Miscellaneous 



228 



MANDATORY REFERENCED STANDARDS 



Table 14-1 



Standard Number 


Standard Title 


Application 


UL 125-97 


Valves for Anhydrous Ammonia and LPG (Other than 
Safety Rehef) 


Valves 


UL 132-97 


Safety Relief Valves for Anhydrous Ammonia and LPG 


Valves 


UL 144-99 


LPG Regulators 


Valves 


UL 174-96 


Household Electric Storage Tank Water Heaters 


Appliances 


UL 343-97 


Pumps for Oil-Burning Appliances 


Pumps 


UL 352-97 


Constant-Level Oil Valves 


Valves 


UL 378-93 


Draft Equipment 


Miscellaneous 


UL 399-93 


Drinking- Water Coolers 


Appliances 


UL 430-94 


Waste Disposers 


Appliances 


UL 441-96 


Gas Vents 


Miscellaneous 


UL 443-95 


Steel Auxiliary Tanks for Oil-Burner Fuel 


Miscellaneous 


UL 499-97 


Electrical Heating Appliances 


Appliances 


UL 563-95 


Ice Makers 


Appliances 


UL 569-95 


Pigtails and Flexible Hose Connectors for LP-Gas 


Fuel Gas 


UL 723-96 


Standard Test for Surface Burning Characteristics of 
Building Materials 


Miscellaneous 


UL 726-95 


Oil-Fired Boiler Assemblies 


Appliances 


UL 732-95 


Oil-Fired Storage Tank Water Heaters 


Appliances 


UL 749-97 


Household Dishwashers 


Appliances 


UL 778-96 


Motor-Operated Water Pumps 


Pumps 


UL 834-95 


Heating, Water Supply, and Power Boilers-Electric 


Appliances 


UL 921-96 


Commercial Electric Dishwashers 


Appliances 


UL 1453-95 


Electric Booster and Commercial Storage Taitk Water 
Heaters 


Appliances 


WQA S-300-91 


Point-of-Use Low Pressure Reverse Osmosis Drinking 
Water Systems 


Appliances 


3-GP-28 


Fuel Oil, Canadian Government Specification Board 


Miscellaneous 



Notes: 

1 Although this standard is referenced in Table 14-1, some of the pipe, tubing, fittings, valves, or fixtures included in the 
standard are not acceptable for use under the provisions of the Uniform Plumbing Code. 

4 See Section 316.1.3 for restriction. 

5 Alloy C85200 for cleanout plugs. 

6 Limited to domestic sewage. 

7 Type II only. ' 

9 ASSE 1066 is not intended to limit the maximum outlet temperature at point of use. 

10 See Section 315.0 for trenching, excavation, and backfilling requirements when installing building drains and sewers. 
Engineers may wish to consult ASTM D 2321 when preparing plans and specifications for sewer mains or specific 
projects. 



229 



Table 14-1 Index 



UNIFORM PLUMBING CODE 



TABLE 14-1 INDEX 

Standards for Materials, Equipment, 
Joints, and Connections 



page 



Standard Number 
Appliances 

AHAMDW-1-92 211 

AHAM DW-2PR-92 211 

AHAMFWD-1-92 211 

AHAM HLW-2 PR-86 211 

ANSIZ21.10.1-98 212 

ANSI Z21. 10.3-2001 212 

ANSI Z21.12-90 212 

ANSI Z21.13-2000 212 

ANSI Z21. 24-2001 212 

ANSI Z21.69-97«CSA 6.16-M97 212 

ANSI Z21. 86-2000 -CSA 2.32-2000 212 

ARI 1010-94 212 

ASME A112.4.1-93(R98) 213 

ASSE 1006-89 215 

ASSE 1007-92 215 

ASSE 1008-89 215 

ASSE 1009-90 215 

ASSE 1023-79 215 

lAPMO PS 103-97 226 

lAPMO PS 108-98 226 

lAPMO PS 113-99^^ 226 

NFPA 85-2001 228 

NSF 3-2001 228 

NSF 12-93 228 

NSF18-96a 228 

NSF 29-93 228 

NSF 42-2002 228 

NSF 44-2002 228 

NSF 53-2002 228 

NSF 58-2002 228 

NSF 62-99 228 

UL 174-96 229 

UL 399-93 229 

UL 430-94 229 

UL 499-97 229 

UL 563-95 229 

UL 726-95 229 

UL 732-95 229 

UL 749-97 229 

UL 834-95 229 

UL 921-96 229 

UL 1453-95 229 

WQAS-300-91 229 



Backflow Protection 

ASSE 1001-90 214 

ASSE 1002-99 214 

ASSE 1004-90 215 

ASSE 1011-95 215 

ASSE 1013-99 .....215 

ASSE 1015-99 215 

ASSE 1019-97 : 215 

ASSE 1020-98... : .215 

ASSE 1021-2001 215 

ASSE 1032-80 .215 

ASSE 1035-95 215 

ASSE 1037-90 215 

ASSE 1047-99 215 

ASSE 1052-94 215 

ASSE 1055-97 215 

ASSE 1056-2001 216 

ASSE Series 5000-98 216 

AWWAC510-97 223 

AWWAC511-97 223 

lAPMO PS 23-89 224 

lAPMO PS 31-95 224 

lAPMO PS 49-92 224 

lAPMO PS 65-2000 225 

Certification 

ASME Section IX 214 

ASSE 6000-98 216 

AWSB2.2-91 222 

ISO Guide 65-1996 227 

DWV Components 

ANSI Al 12.21 .2M-83 211 

ASME A112.21.1M-91(D) 213 

ASME A112.36.2M-91(R98) 214 

lAPMO PS l-2000a 223 

lAPMO PS 7-84 ; 224 

lAPMO PS 9-84 224 

lAPMO PS 38-99 224 

lAPMO PS 41-99 224 

lAPMO PS 47-2002 224 

lAPMO PS 52-99^1 224 

lAPMO PS 59-92 225 

lAPMO PS 60-96 .225 

lAPMO PS 63-99a .....; 225 

lAPMO PS 76-95 225 



230 



MANDATORY REFERENCED STANDARDS 



Table 14-1 Index 



DWV Components (cont.) 

lAPMO PS 79-95 225 

lAPMO PS 80-95^^ 225 

lAPMO PS 81-2000 225 

lAPMO PS 86-95 225 

lAPMO PS 90-95 226 

lAPMO PS 100-96 226 

lAPMO PS 102-97 226 

lAPMO PS 105-97 226 

lAPMO PS 118-2000 227 

NSF 40-2000 228 

NSF 41-99 228 

NSF 46-2000 228 

PDIG-101-85 228 

Fittings 

lAPMO PS 110-99 226 

lAPMO PS 111-99 226 

lAPMO PS 117-2001 226 

Fixtures 

ANSI Al 12. 19.5-99 211 

ANSI Al 18. 10-93 211 

ANSI Z124.1-95 212 

ANSI Z124.2-95 212 

ANSI Z124.3-95 212 

ANSI Z124.4-96 212 

ANSI Z124.5-97 212 

ANSI Z124.6-97 212 

ANSI Z124.7-97 212 

ANSI Z124.8-90 212 

ANSI Z124.9-94 212 

ASME 112.1.3-2000 212 

ASMEAl 12.3.4-2000 213 

ASME A112.6.1M-97 213 

ASME Al 12.6.2-2000 213 

ASME Al 12.14.3-2001 213 

ASME A112.14.4-2001 213 

ASME A112.19.1M-94(R99) 213 

ASME A112.19.2M-98 213 

ASME A112.19.3M-2000 213 

ASME A112.19.4M-94(R99) 213 

ASME A112.19.5-99 213 

ASME A112.19.6-95 213 

ASME A112.19.7M-95 213 

ASME A112.19.9M-91(R98) 213 

ASME A112.19.12-2000 213 

ASSE 1014-90 215 

ASTM D 4068-2001 220 

ASTM D 4551-96(R01) 220 



Fixtures (cont.) 

ASTM D 6104-97 220 

FS WW-P-541-E-Gen.l980 223 

lAPMO PS 4-2000^1 223 

lAPMO PS 16-2000 223 

lAPMO PS 43-91 223 

lAPMO PS 50-92 224 

lAPMO PS 55-92 224 

lAPMO PS 58-92 224 

lAPMO PS 61-92 225 

lAPMO PS 62-93(D) 225 

lAPMO PS 67-93 225 

lAPMO PS 70-2001 225 

lAPMO PS 71 -2000(D) 225 

lAPMO PS 77-99(D) 225 

lAPMO PS 78-01 225 

lAPMO PS 83-95(D) 225 

lAPMO PS 84-95(D) 225 

lAPMO PS 89-95 226 

lAPMO PS 93-2000 226 

lAPMO PS 98-96 226 

lAPMO PS 99-96 226 

lAPMO PS 106-98 226 

MIL-V-29193-80(D) 227 

Fuel Gas 

ANSI B16.40-85(R94) 211 

ANSI Z21 .80-1997 -CSA 6.22-M:97 212 

ANSI Z21. 81-1997* CSA 6.25-M.97 212 

ANSI Z223.1-99 212 

lAPMO PS 40-2001 224 

IAS LC 1-99«CSA 6.26-M99 227 

NFPA 54-2002 228 

NFPA 58-2001 228 

UL 569-95 229 

Joints 

ANSIB2.1-90 211 

ANSI Z21.41-98*CSA 6.9-M98 212 

ASME Bl.20.1-83 (R92) 214 

ASME Bl.20.3-76 (R82/91/98) 214 

ASMEB16.5-96 214 

ASME B16.21-92 214 

ASTM B 29-92(R97) 216 

ASTM B 32-96 216 

ASTM B 813-00=^ 217 

ASTM B 828-00 217 



231 



Table 14-1 Index 



UNIFORM PLUMBING CODE 



Joints (cont.) 

ASTM C 425-2002 217 

ASTM C 443-2001 217 

ASTM C 564-97 217 

ASTM C 1173-97 217 

ASTM D 1869-95(R00) 218 

ASTM D 2235-2001 218 

ASTM D 2564-96a 219 

ASTM D 2657-97 219 

ASTM D 2672-96a 219 

ASTM D 2855-96 219 

ASTM D 3122-95 219 

ASTM D 3138.95 219 

ASTM D 3139-98 219 

ASTM D 3140-90(D) 220 

ASTM D 3212-96a 220 

ASTM F 402-98(R99) 220 

ASTM F 493-97 221 

ASTMF656-96a 221 

AWSA5.8-92 223 

AWWAC606-97 223 

CISPI HSN-85(D) 223 

CISPI 310-97 223 

FSA-A-51145C 223 

FS 0-F-499D-85 223 

FS O-F-506C-72(D) 223 

FS TT-S-1732-71(D) 223 

lAPMO PS 25-84 224 

lAPMO PS 36-90 224 

lAPMO PS 51-98 224 

lAPMO PS 53-92 224 

MSSSP-73-91 227 

SAEJ1670-93 228 

Kitchen, Lavatory, and Shower Fittings with Attached 
Hose Outlets 

ASME Al 12. 18.3-96 213 

Miscellaneous 

ANSI / ICC A117.1-98 211 

ANSI Z358. 1-98 212 

ASHRAE 90.1-2001 212 

ASTM B 152-2000 216 

ASTM B 370-98 217 

ASTM C 478-97 217 

ASTM D 396-2001 218 

ASTM D 4101-2002 220 

ASTM E 84-2001 220 



ASTM E 119-2000a 220 

ASTM E 814-2000 '. 220 

FS OO-L-201 f-70 223 

FS QQ-R-571C-69(D) 223 

Miscellaneous (cont.) 

lAPMO PS 48-2000 224 

lAPMO PS 54-2001a 224 

lAPMO PS 73-93 225 

lAPMO PS 88-95 226 

lAPMO PS 92-95 226 

lAPMO PS 94-2001a 226 

lAPMO PS 96-96 226 

lAPMO PS 114-99^1 226 

lAPMO PS 115-99 226 

lAPMO PS 116-99 226 

lAPMO PS 119-2000 227 

MIL-P-22561-82(D) 227 

NFPA13R-99 228 

NFPA13D-99 228 

NFPA 31-2001 228 

NFPA 211-2000 228 

NSF 24-96 228 

NSF 61-01 228 

SAMALF6a 228 

UL 80-96 ...228 

UL 103-95 228 

UL 378-93 229 

UL 441-96 ; 229 

UL 443-95 229 

UL 723-96 229 

3-GP-28 229 

Piping 

ANSIA13.1-81(R93) 211 

ASME Al 12. 1.2-96 212 

ASME A112.4.3-99 213 

ASME A112.18.6-99 213 

ASME A112.26.1M-84(D) 213 

ASSE 1010-98 215 

ASSE 1034-81(D) 215 

AWWAC203-91a 222 

FS WW-P 325B-76 223 

lAPMO PS 14-99 224 

lAPMO PS 34-96 224 

lAPMO PS 37-90 224 

lAPMO PS 42-96 224 

lAPMO PS 64-98 ..; 225 

lAPMO PS 66-2000 225 

lAPMO PS 85-95 225 

lAPMO PS 95-2001 226 

MSSSP-25-98 227 



232 



MANDATORY REFERENCED STANDARDS 



Table 14-1 Index 



MSSSP-58-93 227 

NFPA 99-2002 228 

NFPA99C-2002 228 

PDI-WH 201-92 228 

Piping, Copper Alloy 

ASME B16.15-85 (R94) 214 

ASME B16.18-84 214 

ASME B16.22-95 214 

ASME B16.23-92 214 

ASME B16.24-2002..... 214 

ASME B16.26-88 214 

ASME B16.29-2002 214 

ASME B16.32-92 214 

ASTMB 42-98 : 216 

ASTMB 43-98 216 

ASTMB 75-99 216 

ASTMB 88-99^1 216 

ASTM B 135-2000 216 

ASTMB 251-97 216 

ASTM B 280-99^1 217 

ASTM B 302-2000 217 

ASTMB 306-99 217 

ASTM B 4472000 217 

ASTM B 584-2000 217 

ASTM B 587-97^1 217 

ASTM B 641-93(D) 217 

ASTM B 642-88(D) 217 

ASTMB 687-99 ....„ 217 

ASTM B 716-93(D) 217 

ASTM B 819-2000 217 

FS WW-U-516A-74(b) 223 

lAPMO PS 2-2000a 223 

MIL-F-1183 H-83(D) 227 

Piping, Ferrous 

ANSI A21.10-98 211 

ANSIA21.11-2000 211 

AKSIA21.51-96 211 

ANSI A21. 53-2000 211 

ANSIA40.3-93 211 

ASME A112.3.1-93 213 

ASMEB16.1-89 ....214 

ASMEB16.3-99 214 

ASMEB16.4-98 214 

ASME B16.12-98..... 214 

ASME B16.39-98 214 

ASME B16.47-96 .....214 

ASME B36.10M-2000 214 



ASTM A 47-99 ., 216 

ASTM A 53-2001 216 

ASTM A 74-98 216 

ASTM A 126-95(R01) 216 

Piping, Ferrous (cont.) 

ASTM A 197M-2000 216 

ASTM A 312-2001a 216 

ASTM A 377-99 216 

ASTM A 518-99 216 

ASTM A 536-84(R99'=0 216 

ASTM A 653M-2001a 216 

ASTM A 733-2001 216 

ASTM A 861-2001a 216 

ASTM A 888-98^^ 216 

ASTM C 1277-97 217 

AWWACllO-98 222 

AWWA Clll-2000 222 

AWWAC151-96 222 

AWWA C153-2000 222 

AWWA C213-2001 222 

AWWAC215-99 ; ; 222 

CISPI 301-2000 223 

lAPMO PS 97-2001 226 

MIL-F-18180C1 227 

MSSSP-42-99 227 

MSSSP-44-96 227 

MSS SP-83-2001 227 

Piping, Non-Metallic 

ANSI A106.6-70 211 

ASTM C 14-99 217 

ASTM C 296-2000 217 

ASTM C 412-99 217 

ASTM C 428-97(R02) 217 

ASTM C 700-2002 217 

ASTM C 1053-2000 .217 

AWWAC400-93 222 

Piping, Plastic 

ASTM C 1440-99^^ 218 

ASTM C 1460-2000 218 

ASTM C 1461-2000 218 

ASTM D 1527-99 218 

ASTM D 1785-99 .....218 

ASTM D 2104-2001 218 

ASTM D 2146-82(D) 218 

ASTM D 2239-2001 218 

ASTM D 2241-2000 218 



233 



Table 14-1 Index 



UNIFORM PLUMBING CODE 



ASTM D 2282-99 218 

ASTM D 2321-2000 218 

ASTM D 2447-2001 218 

ASTM D 2464-99 218 

Piping, Plastic (cont.) 

ASTM D 2465-73(D) 218 

ASTM D 2466-2001 218 

ASTM D 2467-2001 218 

ASTM D 2468-96a 218 

ASTM D 2469-76(D) 218 

ASTM D 2513-2001a 219 

ASTM D 2517-2000 219 

ASTM D 2609-2000 219 

ASTM D 2661-2001 219 

ASTM D 2665-2001 219 

ASTM D 2680-2001 219 

ASTM D 2729-96a 219 

ASTM D 2737-2001 219 

ASTM D 2740-89^KD) 219 

ASTM D 2751-96a 219 

ASTM D 2846-99 219 

ASTM D 2996-2001 219 

ASTM D 3033-85(D) 219 

ASTM D 3034-2001 219 

ASTM D 3035-2001 219 

ASTM D 3036-73(D) 219 

ASTM D 3298-81(D) 220 

ASTM D 3311-94 220 

ASTM D 3965-99 220 

ASTM F 405-98 220 

ASTMF409-99a 220 

ASTM F 437-99 220 

ASTM F 438-2001 220 

ASTM F 439-2001 220 

ASTM F 441-99 220 

ASTM F 442-99 220 

ASTM F 443-77^HD) 220 

ASTM F 480-2000 220 

ASTM F 628-2001 221 

ASTM F 667-97 221 

ASTM F 714-2001 221 

ASTMF789-95a 221 

ASTM F 794-2001 221 

ASTM F 810-2001 221 

ASTM F 876-2001^1 221 

ASTM F 877-2001'=^ 221 



ASTM F 891-2000 221 

ASTM F 949-2001 a 221 

ASTM F 1216-98 221 

ASTM F 1281-2001a 221 

Piping, Plastic (cont.) 

ASTM F 1282-2001a 221 

ASTM F 1412-2001 221 

ASTM F 1673-95 221 

ASTM F 1743-96 221 

ASTM F 1807-99 221 

ASTM F 1866-98 221 

ASTM F 1924-2001 221 

ASTM F 1948-99a 221 

ASTM F 1960-2000^1 222 

ASTM F 1961-99 222 

ASTM F 1970-2001 222 

ASTM F 1973-99el 222 

ASTM F 2080-2001 222 

AWWAC900-97 223 

AWWAC901-97 223 

AWWAC902-96 223 

FSK65.59-71 223 

FSM265-811 223 

lAPMO PS 69-2001 225 

lAPMO PS 82-95 225 

lAPMO PS 91-95 226 

lAPMO PS 107-98 226 

NSF 14-2002 228 

Pumps 

MIL-P-17552F 227 

MIL-P-21251E 227 

MIL-P-52407 (A)-1976(D) 227 

MIL-P-62156 (1)-1983(D) 227 

MIL-P-B-81(D) SSPMA-85 227 

UL 343-97 229 

UL 778-96 229 

Swimming Pools and Spas 

ANSI Z21.56-98«CSA 4.7-2001 212 

ASME A112.19.8M-87(R96) 213 

NSPI 1-1991 224 

Valves 

ANSI A112.14.1-75 (R90) 211 

ANSIZ21.15-97 212 

ANSI Z21. 22-99 212 

ANSIZ21.70-81(D) 212 



234 



MANDATORY REFERENCED STANDARDS 



Table 14-1 Index 



Valves (cont.) 

ASME A112.18.1M-2000 213 

ASME A112.18.7-99 213 

ASME A112.21.3M-85 (ROl) 213 

ASME B16.33-90 214 

ASME B16.34-96 214 

ASME B16.38-85 214 

ASSE 1003-2001 214 

ASSE 1016-96 215 

ASSE 1017-98 215 

ASSE 1018-2001 215 

ASSE 1025-78 215 

ASSE 1028-81(D) 215 

ASSE 1062-97 216 

ASSE 1066-97 216 

AWWAC500-93 222 

AWWA C504-2000 222 

AWWAC507-99 222 

CSA3-92 223 

FS WW-V-54d(D) 223 

FSWW-V-58b 223 

lAPMO PS 45-91 224 

lAPMO PS 57-92 224 

lAPMO PS 72-2000 225 

lAPMO PS 87-95 225 

lAPMO PS 101-97 226 

lAPMO PS 104-97 ; 226 

lAPMO PS 112-99 226 

MSSSP-67-95 227 

MSSSP-70-98 227 

MSSSP-71-97 227 

MSSSP-72-99 227 

MSSSP-78-97 227 

MSSSP-80-97 227 

MSSSP-84(D) 227 

UL 125-97 229 

UL 132-97 229 

UL 144-99 229 

UL 352-97 229 



235 



Table 14-1 Index 



UNIFORM PLUMBING CODE 



ABBREVIATIONS IN TABLE 14-1 

AHAM Association of Home Appliance Manufacturers, 1111 19th Street, N.W., Suite 402, Washington 

DC 20036. 

ANSI American National Standards Institute, Inc., 25 W. 42nd Street, 4th floor. New York, NY 10036. 

ASME The American Society of Mechanical Engineering, Three Park Avenue, New York, NY 10016. 

ASSE American Society of Sanitary Engineering, 901 Canterbury, Suite A, Westlake, Ohio 44145. 

ASTM American Society of Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 

19428-2959. 

AWS American Welding Society, 550 NW Lejuene Road, Miami, FL 33126. 

AWWA American Water Works Association, 6666 W. Quincy Avenue, Denver, CO 80235. 

CISPI Cast Iron Soil Pipe Institute, 5959 Shallowford Road, Suite 419, Chattanooga, TN 37421. 

(D) or [D] Discontinued. 

el An editorial change since the last revision or reapproval. 

FS Federal Specifications, Federal Supply Service, Standards Division, General Services 

Administration, 7th and D Streets, Washington, DC 20407. 

lAPMO International Association of Plumbing and Mechanical Officials, 5001 E. Philadelphia Street, 

Ontario, CA 91761. 

ICC International Code Council, 5203 Leesburg Pike, Suite 600, Falls Church, VA 22041. 

MSS Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street, N.E., 

Vienna, VA 22180. 

NFPA National Fire Protection Association, P.O. Box 9101, 1 Batterymarch Park, Quincy, 

MA 02269-9101. 

NSF NSF International, 789 Dixboro Road, Ann Arbor, MI 48113-0140 

PDI Plumbing and Drainage Institute, 800 Turnpike Street, Suite 300, North Andover, MA 01845. 

UL Underwriters' Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062. 

WQA Water Quality Association, 4151 Naperville Road, Lisle, IL 60532-1088. 



236 



CHAPTER 15 



FIRESTOP PROTECTION 



1501.0 General Requirements. 

1501.1 Applicability. All piping penetrations of 
required fire-resistance-rated walls, partitions, floors, 
floor /ceiling assemblies, roof /ceiling assemblies, or 
shaft enclosures shall be protected in accordance 
with the requirements of NFPA 5000, NFPA Building 
Code, and this chapter. The penetration must meet 
any additional requirements for protection of the 
penetration in the building code adopted by the 
Authority Having Jurisdiction. 

1502.0 Plans and Specifications. 

1502.1 Plans and specifications shall indicate with 
sufficient detail how penetrations of fire-resistance- 
rated assemblies shall be firestopped prior to 
obtaining design approval by the Authority Having 
Jurisdiction. 

1503.0 Installation. 

1503.1 Firestop materials shall be installed in 
accordance with this chapter, the Building Code, and 
the manufacturer's instructions. 



1504.0 Definitions. 

1504.1 Penetration Firestop System. A specific 
assemblage of field-assembled materials, or a 
factory-made device, which has been tested to a 
standard test method and, when installed properly 
on penetrating piping materials, is capable of 
maintaining the fire resistance rating of assemblies 
penetrated. 

1504.2 F Rating. The time period that the 
penetration firestop system limits the spread of fire 
through the penetration when tested in accordance 
with ASTM E 814. 

1504.3 T Rating. The time period that the 
penetration firestop system, including the 
penetrating item, limits the maximum temperature 
rise of 325°F above its initial temperature through the 
penetration on the nonfire side, when tested in 
accordance with ASTM E 814. 



1505.0 Combustible Installations. 

1505.1 Combustible piping installations shall be 
protected in accordance with the appropriate fire 
resistance rating requirements in the building code 
that list the acceptable area, height, and type of 
construction for use in specific occupancies to assure 



compliance and integrity of the fire resistance rating 
prescribed. 

1505.2 When penetrating a fire-resistance-rated 
wall, partition, floor, floor-ceiling assembly, roof- 
ceiling assembly, or shaft enclosure, the fire , 
resistance rating of the assembly shall be restored to 
its original rating with a material or product tested to 
standard(s) referenced in Chapter 14 and at an 
independent testing agency acceptable to the 
Authority Having Jurisdiction. | 

1505.3 Penetrations shall be protected by an 
approved penetration firestop system installed as 
tested in accordance with ASTME 119 or ASTM E 
814, with a minimum positive pressure differential of 
0.01 inch of water. Systems shall have an F rating of 
at least 1 hour but not less than the required fire 
resistance rating of the assembly being penetrated. 
Systems protecting floor penetrations shall have a T 
rating of at least 1 hour but not less than the required 
fire resistance rating of the floor being penetrated. 
Floor penetrations contained within the cavity of a 
wall at the location of the floor penetration do not 
require a T rating. No T rating shall be required for 
floor penetrations by piping that is not in direct 
contact with combustible material. 

1505.4 When piping penetrates a rated assembly, 
combustible piping shall not connect to non- 
combustible piping unless it can be demonstrated 
that the transition complies with the requirements of 
Section 1505.3. 

1505.5 Insulation and Coverings. Insulation and 
coverings on or in the penetrating item shall not be 
permitted unless the specific insulating or covering 
material has been tested as part of the penetrating 
firestop system. 

1505.6 Sleeves. Where sleeves are used, the 
sleeves should be securely fastened to the fire- 
resistance-rated assembly. The (inside) annular 
space between the sleeve and the penetrating item 
and the (outside) annular space between the sleeve 
and the fire-resistance-rated assembly shall be 
firestopped in accordance with the requirements for 
a sleeve penetrating item. 

1506.0 Non-combustible Piping Installations. 

1506.1 Non-combustible piping installations shall 
be protected in accordance with the appropriate fire 
resistance rating requirements in the building code 
that list the acceptable area, height, and type of 
construction for use in specific occupancies to assure 



237 



1506.1 -1507.4 



UNIFORM PLUMBING CODE 



compliance and integrity of the fire resistance rating 
prescribed. 

1506.2 When penetrating a fire-resistance-rated 
wall, partition, floor, floor-ceiling assembly, roof- 
ceiling assembly, or shaft enclosure, the fire 
resistance rating of the assembly shall be restored to 
its original rating with a material or product tested to 
standard(s) referenced in Section 1506.3 and at an 
independent testing agency acceptable to the 

I Authority Having Jurisdiction. 

Exceptions: 

(1) Concrete, mortar, or grout may be used to 
fill the annular spaces around cast iron, 
copper, or steel piping that penetrates 
concrete or masonry fire-resistant-rated 
assemblies. The nominal diameter of the 
penetrating item should not exceed 6 inches 
(15.2 cm), and the opening size should not 
exceed 144 in.^ (929 cm^). 

The thickness of concrete, mortar, or 
grout should be the full thickness of the 
assembly or the thickness necessary to 
provide a fire resistance rating not less than 
the required fire resistance rating of the 
assembly penetrated , or 

(2) The material used to fill the annular space 
shall prevent the passage of flame and hot 
gases sufficient to ignite cotton waste for the 
time period equivalent to the fire-resistance 
rating of the assembly when tested to stan- 
dard(s) referenced in Section 1506.3. 

1506.3 Penetrations shall be protected by an 
approved penetration firestop system installed as 
tested in accordance with ASTM E 119 or ASTM E 
814, with a minimum positive pressure 
differential of 0.01 inch of water. Systems shall 
have an F rating of at least 1 hour but not less 
than the required fire-resistance rating of the 
assembly being penetrated. Systems protecting 
floor penetrations shall have a T rating of at least 
1 hour but not less than the required fire- 
resistance rating of the floor being penetrated. 
Floor penetrations contained w^ithin the cavity of a 
wall at the location of the floor penetration do not 
require a T rating. No T rating shall be required 
for floor penetrations by piping that is not in 
direct contact with combustible material. 

1506.4 When piping penetrates a rated assembly, 
combustible piping shall not connect to non- 
combustible piping unless it can be demonstrated 
that the transition complies with the requirements of 
Section 1506.3. 

1506.5 Unshielded couplings shall not be used to 
connect non-combustible piping unless it can be 



demonstrated that the fire-resistive integrity of the 
penetration is maintained. 

1506.6 Sleeves. Where sleeves are used, the 
sleeves should be securely fastened to the fire- 
resistance-rated assembly. The (inside) annular 
space between the sleeve and the penetrating item 
and the (outside) annular space between the sleeve 
and the fire-resistance-rated assembly shall be 
firestopped in accordance with the requirements for 
a sleeve-penetrating item. 

1506.7 Insulation and Coverings. Insulation and 
coverings on or in the penetrating item shall not be 
permitted unless the specific insulating or covering 
material has been tested as part of the penetrating 
firestop system. 

1507.0 Required Inspection. 

1507.1 General. Prior to being concealed, piping 
penetrations shall be inspected by the Authority 
Having Jurisdiction to verify compliance with the 
fire-resistance rating prescribed in the Building 
Code, NFPA 5000, NFPA Building Code. 

1507.2 The Authority Having Jurisdiction shall 
conduct a thorough examination of sufficient 
representative installations, including destructive 
inspection, to provide verification of satisfactory 
compliance with this chapter, the appropriate 
manufacturers' installation standards applied by the 
installer, construction documents, specifications, and 
applicable manufacturers' product information. 

1507.3 The Authority Having Jurisdiction shall 
determine the type, size, and, quantity of 
penetrations to be inspected. 

1507.4 The Authority Having Jurisdiction shall 
compare the field installations with the 
documentation supplied by the installer to 
determine the following: 

(1) The required F ratings (1, 2, 3, or 4 hour) and 
T ratings (0, 1, 2, 3, or 4 hour) of the firestop 
penetration firestop systems are suitable for 
the assembly being penetrated. 

(2) The penetrating firestop systems are 
appropriate for the penetrating items as 
documented through testing of the systems 
conducted by an independent testing agency. 

(3) The penetrating firestop system is installed 
as tested. 



238 



APPENDICES 

The appendices are intended to supplement the provisions of the installation requirements of this Code. The 
definitions in Chapter 2 are also applicable to the appendices. 

CONTENTS 

Page 
Appendix A 

Recommended Rules for Sizing the Water Supply System 241 

Appendix B 

Explanatory Notes on Combination Waste and Vent Systems 257 

Appendix C Deleted 

I 

Appendix D 

Sizing Storm Water Drainage Systems 259 

Appendix E 

Manufactured/Mobile Home Parks and Recreational Vehicle Parks 267 

Appendix F 
Reserved 

Appendix G 

Gray Water Systems for Single-Family Dwellings 279 

Appendix H 

Recommended Procedures for Design, Construction, and Installation of Commercial 

Kitchen Grease Interceptors 289 

Appendix I 

Installation Standards 293 

Appendix J 

Reclaimed Water Systems for Non-Residential Buildings 397 

Appendix K 

Private Sewage Disposal Systems 401 

Appendix L 

Alternate Plumbing Systems .413 



239 



UNIFORM PLUMBING CODE 



240 



APPENDIX A 

RECOMMENDED RULES FOR SIZING THE WATER SUPPLY SYSTEM 



Because of the variable conditions encountered, it is 
impractical to lay down definite detailed rules of 
procedure for determining the sizes of water supply 
pipes in an appendix which must necessarily be 
limited in length. For a more adequate understanding 
of the problems involved, refer to Water-Distributing 
Systems for Buildings, Report BMS 79 of the National 
Bureau of Standards; and Plumbing Manual, Report 
BMS 66, also published by the National Bureau of 
Standards. 

The following is a suggested order of 
procedure for sizing the water supply system. 

A 1 Preliminary Information. 

A 1.1 Obtain the necessary information 
regarding the minimum daily service pressure in the 
area where the building is to be located. 

A 1 .2 If the building supply is to be metered, 
obtain information regarding friction loss relative to 
the rate of flow for meters in the range of sizes likely 
to be used. Friction-loss data can be obtained from 
most manufacturers of water meters. Friction losses 
for disk-type meters may be obtained from Chart A-1. 

A 1.3 Obtain all available local information 
regarding the use of different kinds of pipe with 
respect both to durability and to decrease in capacity 
with length of service in the particular water supply. 

A 2 Demand Load. 

A 2.1 Estimate the supply demand for the 
building main and the principal branches and 
risers of the system by totaling the fixture units on 
each. Table A-2, and then by reading the 
corresponding ordinate from Chart A-2 or A-3, 
whichever is applicable. 

A 2.2 Estimate continuous supply demands in 
gallons per minute (liters per second) for lawn 
sprinklers, air conditioners, etc., and add the sum to 
the total demand for fixtures. The result is the 
estimated supply demand of the building supply. 

A 3 Permissible Friction Loss. 

A 3.1 Decide what is the desirable minimum 
residual pressure that shall be maintained at the 
highest fixture in the supply system. If the highest 
group of fixtures contains flushometer valves, the 
residual pressure for the group shall not be less than 
fifteen (15) psi (103 kPa). For flush tank supplies, the 



available residual pressure shall not be less than 
eight (8) psi (55 kPa). 

A 3.2 Determine the elevation of the highest 
fixture or group of fixtures above the water (street) 
main. Multiply this difference in elevation by forty- 
three hundredths (0.43). The result is the loss in static 
pressure in psi. (pounds per square inch) (kPa). 

A 3.3 Subtract the sum of loss in static pressure 
and the residual pressure to be maintained at the 
highest fixture from the average minimum daily 
service pressure. The result will be the pressure 
available for friction loss in the supply pipes, if no 
water meter is used. If a meter is to be installed, the 
friction loss in the meter for the estimated maximum 
demand should also be subtracted from the service 
pressure to determine the pressure loss available for 
friction loss in the supply pipes. 

A 3.4 Determine the developed length of pipe 
from the water (street) main to the highest fixture. If 
close estimates are desired, compute with the aid of 
Table A-3 the equivalent length of pipe for all fittings 
in the line from the water (street) main to the highest 
fixture and add the sum to the developed length. The 
pressure available for friction loss in pounds per 
square inch (kPa), divided by the developed lengths 
of pipe from the water (street) main to the highest 
fixture, times one hundred (100), will be the average 
permissible friction loss per one hundred (100) foot 
(30,480 mm) length of pipe. 

A 4 Size of Building Supply. 

A 4.1 Knowing the permissible friction loss per 
one hundred (100) feet (30,480 mm) of pipe and the 
total demand, the diameter of the building supply 
pipe may be obtained from Charts A-4, A-5, A-6, or 
A-7, whichever is applicable. The diameter of pipe 
on or next above the coordinate point corresponding 
to the estimated total demand and the permissible 
friction loss will be the size needed up to the first 
branch from the building supply pipe. 

A 4.2 If copper tubing or brass pipe is to be used 
for the supply piping and if the character of the 
water is such that only slight changes in the 
hydraulic characteristics may be expected. Chart A-4 
may be used. 

A 4.3 Chart A-5 should be used for ferrous pipe 
with only the most favorable water supply as 
regards corrosion and caking. If the water is hard or 
corrosive. Chart A-6 or A-7 will be applicable. For 
extremely hard water, it will be advisable to make 



241 



Appendix A 



UNIFORM PLUMBING CODE 



additional allowances for the reduction of capacity of 
hot- water lines in service. 



A 5 Size of Principal Branches and Risers. 

A 5.1 The required size of branches and risers 
may be obtained in the same manner as the building 
supply by obtaining the demand load on each 
branch or riser and using the permissible friction loss 
computed in Section A 3. 

A 5.2 Fixture branches to the building supply, 
if they are sized for the same permissible friction 
loss per one hundred (100) feet (30,480 mm) of 
pipe as the branches and risers to the highest level 
in the building, may lead to inadequate water 
supply to the upper floor of a building. This may 
be controlled by (1) selecting the sizes of pipe for 
the different branches so that the total friction loss 
in each lower branch is approximately equal to 
the total loss in the riser, including both friction 
loss and loss in static pressure; (2) throttling each 
such branch by means of a valve until the 
preceding balance is obtained; (3) increasing the 
size of the building supply and risers above the 
minimum required to meet the maximum 
permissible friction loss. 

A 5.3 The size of branches and mains serving 
flushometer tanks shall be consistent with sizing 
procedures for flush tank water closets. 



pipe from the pressure-reducing valve to the most 
distant fixture of two hundred (200) feet (60,960 
mm); and fixtures to be installed with flush valves 
for water closets and stall urinals as follows: 

If the pipe material and water supply are such 
that Chart A-5 applieis, the required diameter of the 
building supply is three (3-1/2) inches (88.9 mm) and 
the required diameter of the branch to the hot-water 
heater is one and one-half (1-1 /2) inches (40 mm). 

The sizes of the various branches and risers may 
be determined in the same manner as the size of the 
building supply or the branch to the hot-water 
system by estimating the demand for the riser or 
branch from Chart A-2 or A-3 and applying the total 
demand estimate from the branch, riser, or section 
thereof to the appropriate flowchart. 



^ 



A 6 General. 

A 6.1 Velocities shall not exceed 10 feet /second 
(3.0 m/sec.) or the maximum values given in the 
appropriate Installation Standard, except as 
otherwise approved by the Authority Having 
Jurisdiction. 

A 6.2 If a pressure-reducing valve is used in the 
building supply, the developed length of supply 
piping and the permissible friction loss should be 
computed from the building side of the valve. 

A 6.3 The allowances in Table A-3 for fittings 
are based on non-recessed threaded fittings. For 
recessed threaded fittings and streamlined soldered 
fittings, one-half (1/2) the allowances given in the 
table will be ample. 



A 7 Example. 

A 7.1 Assume an office building of four (4) 
stories and basement; pressure on the building side 
of the pressure-reducing valve of fifty-five (55) psi 
(379 kPa) (after an allowance for reduced pressure 
falloff at peak demand); an elevation of highest 
fixture above the pressure-reducing valve of forty- 
five (45) feet (13,716 mm); a developed length of 



242 



RECOMMENDED RULES FOR 
SIZING THE WATER SUPPLY SYSTEM 



Appendix A 



Chart A-1 
Friction Losses for Disk-Type Water l\/leters 



20 
C16 



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_i 

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(0 

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5 6 78 910 20 30 40 50 60 80 100 200 300 400 600 8001000 

Flow - Gallons per Minute 

Chart A-1 (Metric) 
Friction Losses for Disk-Type Water Meters 



110.2 

68.9 
62.0 
55.1 
48.2 
41.3 
34.5 
27.6 

20.7 
13.8 



6.9 













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C\J 00 ■* O h-CO 

CO CO ■* in into 
o o d d do 



Flow - Liters per Second 



243 



Inch 


mm 


1/2 


15 


3/4 


20 


1 


25 



Appendix A UNIFORM PLUMBING CODE 

TABLE A-2 
Water Supply Fixture Units (WSFU) and Minimum Fixture Branch Pipe Sizes^ 

Minimum 
Fixture Brancli Private Public Assembly^ 

Appliances, Appurtenances or Fixtures^ Pipe Size ""'^ 

Bathtub or Combination Bath/Shower (fill) 1/2" 

3/4" Bathtub Fill Valve 3/4" 

Bidet 1/2" 

Clothes Washer 1/2" 

Dental Unit, cuspidor 1/2" 

Dishwasher, domestic 1/2" 

Drinking Fountain or Watercooler 1/2" 

Hose Bibb 1/2" 

Hose Bibb, each additionaP 1/2" 

Lavatory 1/2" 

Lawn Sprinkler, each head^ 

Mobile Home, each (minimum) 

Sinks 

Bar 1/2" 

Clinic Faucet 1/2" 

Clinic Flushometer Valve 

with or without faucet 1" 

Kitchen, domestic 1/2" 

Laundry 1/2" 

Service or Mop Basin 1/2" 

Washup, each set of faucets 1/2" 

Shower 1/2" 

Urinal, 1.0 GPF 3/4" 

Urinal, greater than 1.0 GPF 3/4" 

Urinal, flush tank 1/2" 

Washfountain, circular spray 3/4" 

Water Closet, 1 .6 GPF Gravity Tank 1/2" 

Water Closet, 1 .6 GPF Flushometer Tank 1/2" 

Water Closet, 1.6 GPF Flushometer Valve 1" 

Water Closet, greater than 1 .6 GPF Gravity Tank 1/2" 

Water Closet, greater than 1.6 GPF Flushometer Valve 1" 

Notes: 

1 . Size of the cold branch outlet pipe, or both the hot and cold branch outlet pipes. 

2. Appliances, Appurtenances, or Fixtures not included in this Table may be sized by reference to fixtures having a similar flow rate 
and frequency of use. 

3. The listed fixture unit values represent their total load on the cold water service. The separate cold water and hot water fixture unit 
value for fixtures having both cold and hot water connections may each be taken as three-quarters (3/4) of the listed total value of 
the fixture. 

4. The listed minimum supply branch pipe sizes for individual fixtures are the nominal (I.D.) pipe size. 

5. For fixtures or supply connections likely to impose continuous flow demands, determine the required flow in gallons per minute 
(GPM) and add it separately to the demand (in GPM) for the distribution system or portions thereof. 

6. Assembly [Public Use (See Table 4-1 )]. 

7. Reduced fixture unit loading for additional hose bibbs as used is to be used only when sizing total building demand and for pipe 

sizing when more than one hose bibb is supplied by a segment of water distributing pipe. The fixture branch to each hose bibb 
shall be sized on the basis of 2.5 fixture units. 



4.0 


4.0 




10.0 


10.0 




1.0 






4.0 


4.0 
1.0 




1.5 


1.5 




0.5 


0.5 


0.71 


2.5 


2.5 




1.0 


1.0 




1.0 


1.0 


1.0 


1.0 


1.0 




12.0 






1.0 


2.0 
3.0 

8.0 




1.5 


1.5 




1.5 


1.5 




1.5 


3.0 
2.0 




2.0 


2.0 




3.0 


4.0 


5.0 


4.0 


5.0 


6.0 


2.0 


2.0 
4.0 


3.0 


2.5 


2.5 


3.5 


2.5 


2.5 


3.5 


5.0 


5.0 


8.0 


3.0 


5.5 


7.0 


7.0 


8.0 


10.0 



244 



RECOMMENDED RULES FOR 
SIZING THE WATER SUPPLY SYSTEM 



Appendix A 



TABLE A-3 

Allowance in Equivalent Length of Pipe for Friction Loss in Valves and Threaded Fittings* 

Equivalent Length of Pipe for Various Fittings 





90° 


45" 


90° 


Coupling or 








Diameter 


Standard 


Standard 


Standard 


Straight 


Gate 


Globe 


Angle 


of Fitting 


Elbow 


Elbow 


Tee 


Run of Tee 


Valve 


Valve 


Valve 


Inches 


Feet 


Feet 


Feet 


Feet 


Feet 


Feet 


Feet 


3/8 


1.0 


0.6 


1.5 


0.3 


0.2 


8 


4 


1/2 


2.0 


1.2 


3.0 


0.6 


0.4 


15 


8 


3/4 


2.5 


1.5 


4.0 


0.8 


0.5 


20 


12 


1 


3.0 


1.8 


5.0 


0.9 


0.6 


25 


15 


1-1/4 


4.0 


2.4 


6.0 


1.2 


0.8 


35 


18 


1-1/2 


5.0 


3.0 


7.0 


1.5 


1.0 


45 


22 


2 


7.0 


4.0 


10.0 


2.0 


1.3 


55 


28 


2-1/2 


8.0 


5.0 


12.0 


2.5 


1.6 


65 


34 


3 


10.0 


6.0 


15.0 


3.0 


2.0 


80 


40 


4 


14.0 


8.0 


21.0 


4.0 


2.7 


125 


55 


5 


17.0 


10.0 


25.0 


5.0 


3.3 


140 


70 


6 


20.0 


12.0 


30.0 


6.0 


4.0 


165 


80 



TABLE A-3 (Metric) 
Equivalent Length of Pipe for Various Fittings 





90° 


45° 


90° 


Coupling or 








Diameter 


Standard 


Standard 


Standard 


Straight 


Gate 


Globe 


Angle 


of Fitting 


Elbow 


Elbow 


Tee 


Run of Tee 


Valve 


Valve 


Valve 


mm 


mm 


mm 


mm 


mm 


mm 


mm 


mm 


10 


305 


183 


457 


91 


61 


2,438 


1,219 


15 


610 


366 


914 


183 


122 


4,572 


2,43S 


20 


762 


457 


1,219 


244 


152 


6,096 


3,658 


25 


914 


549 


1,524 


274 


183 


7,620 


4,572 


32 


1,219 


732 


1,829 


366 


244 


10,668 


5,486 


40 


1,524 


914 


2,134 


457 


305 


13,716 


6,706 , 


50 


2,134 


1,219 


3,048 


610 


396 


16,764 


8,534 


65 


2,438 


1,524 


3,658 


762 


488 


19,812 


10,363 


80 


3,048 


1,829 


4,572 


914 


610 


24,384 


12,192 


100 


4,267 


2,438 


6,401 


1,219 


823 


38,100 


16,764 


125 


5,182 


3,048 


7,620 


1,524 


1,006 


42,672 


21,336 


150 


6,096 


3,658 


9,144 


1,829 


1,219 


50,292 


24,384 



^Allowances are based on non-recessed threaded fittings. Use one-half (1/2) the allowances for recessed threaded 
fittings or streamlined solder fittings. 



245 



Appendix A 
A 7 Example 



UNIFORM PLUMBING CODE 



Fixture Units and Estimated Demands 



Building Supply Demand 

Building Supply 
Demand 



Branch to Hot Water System 

Demand 
Fixture Unit in gallons 



Kind of 


No. of 


Fixture Unit 


Total in gpm 


No.ol 




Demand per minute 


Fixtures 1 


Fixtures 


Demand 


Units (L per sec) 


Fixtures 


Calculation (L per sec) 


Water Closets 


130 


8.0 


1040 


- 




- 


Urinals 


30 


4.0 


120 


- 




- 


Shower Heads 


12 


2.0 


24 


12 


12 


X 2x3/4=18 


Lavatories 


100 


1.0 


100 


100 


100 


1x1x3/4=75 


Service Sinks 


17 


3.0 


81 


27 


27 


x3x3/4=61 


Total 






1,365,252 gpm (15.8 L/s) 






154 55gpm(3.4L/s) 



Allowing for 15 psi (103.4 kPa) at the highest fixture under the maximum demand of 252 gallons per minute 
(15.8 L/sec), the pressure available for friction loss is found by the following: 

55 - [15 + (45 X 0.43)] = 20.65 psi 
Metric: 379 - [103.4 + (13.7 x 9.8)] = 142.3 kPa 
The allowable friction loss per 100 feet (30.4 m) of pipe is therefore: 

100 X 20.65 ^ 200 = 10.32 psi 
Metric: 30.4 x 142.3 - 60.8 = 71.1 kPa 



246 



RECOMMENDED RULES FOR 
SIZING THE WATER SUPPLY SYSTEM 



500 



Appendix A 



Chart A-2 
Estimate Curves for Demand Load 



400 



Q. 300 
(3 
I 

TJ 

C 
(0 

£ 200 
Q 



100 

















J P" 


rf '•'' 


^ ? 


^w 


^ p 


, ^ ' 


^ ^ ' 


^ ^ 


^ ^ 


gl ^ 


^ ^ 


^ ? 


- p 


3 ' 


^ ' 


J F 


^ 


^ ^ 


^ i^ 


3 " 


^ ^ 


. pl 


^ ' 


J ^ 


^ r 


^ i 


- ^5 


J ^ ^ 


"1 ^ ^ ^^ 


d A 


d A 


i d^ ^ No 1 for system predominantly for flushometer valves - 








? . r 


J ^ . r 


* . r 


1 P 


L ^ 


/ 







500 1000 1500 2000 

Fixture Units 



2500 3000 



Chart A-2 (Metric) 
Estimate Curves for Demand Load 



31.5 



•o 25.4 
c 
o 
u 

0) 
(0 

S 18.9 



I 

c 

(0 

E 12.6 

0) 

Q 



6.3 

















^ p 


d '^ 


- pi ^ 


- IP ^ 


^ p 


^ ^ ' 


. ^ ' 


^ p ^ 


^ " 


^ ^ 


^ ^ 


- p 


_ ^ 


^ ? 


^ ^ 


J F 


^ 


^ ^ 


J F 


3 " 


^ ' 


pl 


i 


, W 


g * 


^1 


^3 


J I' ^ 


"1 ^ ^^ 


A^ A^ 


4 d 






lH^r^ ki^r I' .if/ii.i 


^ i ' No. 2 for system predominantly for tiusri tanks 


3 J r 


^ ^ ^ 


' . r 


i ^ 


r y 


3 







500 1000 1500 2000 

Fixture Units 



2500 3000 



247 



Appendix A 



UNIFORM PLUMBING CODE 



0. 

O 

I 

■o 

c 

CO 

E 

0) 

o 



■o 
c 
o 
o 
o 
{A 



I 

■a 

c 

(0 

E 

0) 
Q 



Chart A-3 
Enlarged Scale Demand Load 





















* • * ' 










***** 










■ ** " 


pn __- 








■ **" 










* * " * 








1 ^ ) 


• * ^M 








^ * * * 


■ • '* * 


RD _ _ 






^^* 


■ •* * " 






^ 


9* 


• ** *" 






^ ? 




« • *"* 




1 ^ 


^^ 


^^ ■ 


* 


An 


M--^- 




g * •* 






"5^ 




^ * * 






? 


^ P 










^^^ ^ 






20 _- 


-<? 










<*' 


2 








? 








A^ 





















20 40 60 80 100 120 140 160 180 200 220 240 

Fixture Units 



Chart A-3 (Metric) 
Enlarged Scale Demand Load 





■ " 






""" 


"" ~ 




^ " 










M ■■ 
















b.o 






































• * " ' 








































■ * 
































1 ^ * 


•" 








c n 




























■ * * 


* 










b.U 


























^ ■ 


• ' * 




































* * 














« * * 






















** 


















• * * 


'5 R 




























^2 


• * 






o.o 














9 * 














■ * ^ 


•"" 




















^^ 
















« « ■ 


• ■ * 














-- 


- 1 




^•^ 
















"■* 
















9 R 


,^" 








































*'' 








^ ^ 




























>'' 






,^ 


^'*' 
































r 




^^ 
































1 3 






^^'• 








































,*^ 


? 




































y**' 






































/ 


n 








































±. 




















Mm 








^^ 









20 40 60 80 100 120 140 160 180 200 220 240 
Fixture Units 



248 



RECOMMENDED RULES FOR 
SIZING THE WATER SUPPLY SYSTEM 



Appendix A 



Chart A-4 



Hnnnpr Tiihinn 











1 


— 




-- 











~ 




-- 




























^ 


' 


Smooth Pipe 


























/ 




Type M - 


- 






















A 








Type L - 




— 
















J 


^ 








^^ 


Type K 


' ' 














y 


^, 






y 


/" 






































,A 


\ 


< 


/ 




.^ 


.' 














Le^ 


s^ 


\ 






>,/^ 


y. 


\ 


s 


Y 




^ 












^ 


<^ 




— 


sr 




-\ ^^ 


— \-; 


y^ 


y 


A 


















\ 


b 


y 


A 






^A. 


y 






v^ 


, 












^^ 


N 


/ 






\ 


Z^-X / 


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X- 






V 


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,^ 








;r 




^ 


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k 


y 


y 


s 


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\ 


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s, 






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A 


\ 


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<' 


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\ 


r 




\^ ^ 


X 


^ 




\ 


s 




A 




1 

-^ 




X 


;;$$; 


:> 




/ 




^1 




X 


\ 




y 






■^ N 


,x 






^■^ 


^^" \^ 


-x- 


n 


\~ 




^■- 


\ •O. 


"T^ 






^ 




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V 




y 






\ 




V 






\ v^^^ 


\ 


y 








, 




\ 


y 




Vti 


\^^\ 


\ 


^ 


'\ 






\ > 


X 


/ 






<_s 


,' 




V 


y 




s 


'^\ 


^ 


c 




\ 






^ 




. 




/, 




^ \ J 


A 








^ \ 


K 


\, 






V- 


' \^^ 




y ' 


>5 




S 






y 


\ 




/ 


\^\ 


\ 


\ 


<: 








A "y 


^1 






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;- 


k. ^ 


^ 


^\ 


\ 




\ y 






\ 


C 


/^ 




o 


.^/. 




^ 


:^-^ 


\ 




y\ 


\ 


A 






X 


d 




\ 
X 

V 


5? 


' ' \ ^ 

XkX 


1 




^ 


\ 


^. 


"-'_ 






-^ 


1^ 


N 


-'^ ^ 


< y^^ 


^ '\ 


— 




»^^ 


^C^ \ 




v^ 


^ 


^ 


s 


-- 






y^ 




^y 


\ 


\y^ 




1 


^ 


^'' 






^ 








V 




X 




\ 


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\ ^X' 


\ 


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^y. 


^ 


y<. 




^ ^ 


^^ 






,\^- 


,> 


^ 


s 




A 




\y^y" 


\ 


L> 


■ X 




\ 


\ y 






\ 


^ 


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\y 






\^. 


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-^X^ 


^ 




\ 




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X 


^ 


^ 








^ 


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y. 


y 
^ 


^V 


,y\yy 


y 


\l 






\- 




Xk 


^ 


' 


\ 








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\ 




\ 


^ ^ \ 




^ 


^ 


<^ 


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\ ''X\ 


X 


\ 






\ 
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^/^^ 




^ 
^ 


i 


\ 




S 




^ 


\ 


(T'^ 


.r^ 


^^ 


:^ 


\ 


:i 







10,000 




8000 




6000 




5000 




4000 




3000 




2000 




1000 




800 




600 




500 
400 

300 


C 

i 


200 


o 
a. 


100 

80 

60 
50 


(0 

c 
o 

« 
O 
c 


40 
30 


o 
uZ 



0.1 



0.2 0.3 0.4 0.6 0.8 1 



2 3 4 5 6 8 10 



1 
20 30 40 50 60 80100 



Friction Loss - Lbs. per Square-lncli Head per 100 Foot Length 



249 



Appendix A 



UNIFORM PLUMBING CODE 



Chart A-4 (Metric) 







"^ _ 








*^ 




^ "■ 






"^^ 


^™ 
































y 


Smooth Pipe 


























^' 


Type M - 


_ 


~ 




















/ 






Type L - 























^ 






y 


Type K - 






—^ 














^ 


^ 






/ 




























\ 


<^ 


/ 




y 












^ 




^ 


^ 


^ 




v^ 


H 


\ 


5 
















T^ 


t— 




— 


^ 




- -V. ^^ 


~\ 


7^ 


^ 


r 


_, 












\>'$^ 


S, 


v^- 


X 


\ 




\y 


^ 


/ 






?• 3 












^ 


V 


/ 






s, 


,'A / 


^ 








\y 












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/\ 






^ 


V 




^ 




> 


/ 


^\ 










y 


\ V 




\, 




> 


s 


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V 


/ 




\ 






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K 


^ 


\ 


/C 


^ 






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' 


\ 




x^"^ 


^ 


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\ 


<' 




V 


y^ 


% 


£ 


ej:^ 


Vrf>^^ 


V 


/ 


/ 


\ 


V 


'^ 








X 


-^-X'^N > — 




y' 


- 


^ 

^ 






A 


H 


/ 


^ 


X 


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^ 






Y-^ 


x^^. Vo^ 






\ 




7-^ 


S n. 


^-- 




r^ 


^ 




V 






y 


\ .^ 








V 






6.0/ 


N 




^, 




' 


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^\ ' 


v^/\ 




y 


' \ 






\^ 


V. 


^ 


s 




^ y 


^ 




^ 


y 


\'^ 


' ^ > 








\, 






^^ 








^'t^ 


' V/ 


x^\ 






> 


■^ \ 




\ 






V^ 


' \ /^ 




^ >'^ 


x: 




\ 


^ 




\ 




/ 






\ 


<; 


X 




,^\ 


^"^ 


^ 






)^' 


O 


< 


^\ 


\ 


//- 


\ ^ 




\ 


\ 


c 


y" 


V><^ 


1 


^><^ 


^ 


y- 




X. 


\ 




^ 


\ 






A 
^ 


1 


s 

V 


^{ 




K 


X, 


\^ 


\ 


N^;; 


^^\ 




-\ 


;^ 


\ 


-■"= -^ 


^^ 


-A 




-N 


'^ 


H^ — V- 




V^ 


^ 


.^ 




\ 




y^ 




^ 


\ ^^ 








^ 


V- 






.V 








\ 


^ 




v 


X 


S ^ ^^' 


'\ 


^ 


'V 


^ 


^v 


\ \ 


/ / 


^xN 






^. -'^ 




\ 




'A 




c^/ 




'>' 


',>\ 




S 


\ , ■' 


V^'' 




\ 


^ 


^'■■ 


^ 


V 


/ 




\-. 


^>\ 


^^ 






\ 




\ /\yy 




X 


> 


y'^ 


1^ 


^ 


"\ 




-^ 


?V 


\ -^ 


>' 








\^ 


■l^\ 


^ i^ 


^ 


' 


\ 




^ 


y' 
^>^ 


\ 




..^ 


s'^\ 




X , 


\ 


> 


>^ 


.HI 


N 


\ 






\ 

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^ 
/>^ 




^ 


\ 


kj 


L ^\X 


c2. 


^ 




<^ y- 




i 


1 


\ 


\ 


\ 



630.0 
504.0 

378.0 
315.0 
252.0 

189.0 
126.0 



63.0 




50.4 




37.8 




31.5 




25.2 






■o 


18.9 


c 




o 


12.6 


% 




(/} 




\m 




0) 


6.3 


a 




(0 


5.0 


0) 






3.8 


-1 


3.2 


c 


2.5 




1.9 


1 








u. 


1.3 




0.6 




0.5 




0.4 




0.4 




0.3 




0.3 





0.2 



0.1 



CO 


•* t- 


CO 


en 


oo 


t--. 


CO 


to •* 


OJ 


o 


o 


oo 


CO 


K 


t^ 


CD 


lO 


CO 


CD O) 


CD 


CM 


Irt 


00 


^— 


■* r^ 


00 


CD 


t^ 


CO 


IT) 


^ 


ro 


,_ 


m 






CV 


CO 


CD 


CD 


CO 


CD CD 


CO 


CM 


in 


oo 








ro 




















CM 


CO 


CD 


05 


CO 


^ 


CD 


CO 


CJ 
CO 



Friction Loss - 32.9 Pa/m 



250 



RECOMMENDED RULES FOR 
SIZING THE WATER SUPPLY SYSTEM 



Appendix A 



Chart A-5 









- 


V 




^ 




-\^^ 







z: 


■ 




^ ^ 




\ 


^ 


v^ \ 




X 




Fairly 




^ 


V,c 


^ 


\ 




s ^ 




^' 


Smooth 






■y^ 




\ ./ 


\ ^ 


\ 




^^ 






Vx 






^\ 


v^ 


\ 




^-^ 




1 ^ 


rri 




0'?>\ \ 


i^ 




\ 


^.'^ \ 


> 


^ 




\ 


\ 


\ 







9\ 


^ 


— ^ 


^ ^^ 


y — 


^ 


^'=- 




X 


\ 




"'\ \ 


\ 


> 




X . 


i 




^^/: 


^-\ — 


^^\ 




^-^ 


f N^ 


-IK 




w---^ 


v^ 




V 


--k--: 


V 


' 




j< 




' \ 








X 


s 


^ ^c?> 


^\ 




\^ 


^\ 


^ ^ 




^ 




V"^^^ 


X 


> 


^ S-^ 


^ \ 


^ 




\ 


s^ \ 


^ 


\ 


A^ 


^^ y\ 


/I 




^ ^^ 


> 


^ 


^ 


A 
^ ^ 


<^\ ^ 


\ 


\ 






^ 




V ^ 




\ 


^ 


>^" 


\ \^ 


\ 




\V" 


n. . — \ , 






^ V^" 


\ ^ 


X^ 




>r 






< 




y \(3^ 




^ 






— 


\ 




t_{ ^y<(\ 


< 




v^ 




\ 


\ 




^ 


y ^^ 




.r 




-^ 




C^ 


^-' ^ 


:^ 




^^ 




y< 


^ 


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•'- Ns- ^ 


^ * 




^^ 


\ \'>^ 


S. 


/ 


^ 


\ ^' 


\^ 


^ 


>^^. 




\, 


V 


\ 


\^ 


^ 




A 




^\ 




:^ A 


> ^V 


V 


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A 


. 'A ^ 




\, 


S^-- 


\^ 


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V' \^ 


"\ 


\ 


. ^^ 


^ A'^ 




\ 




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X 


\ 


/^^ 


\ ^\ 


\ 




V, 


^^r \ 




^ 


V X 


^ ^ 


V 


^ 


V-' 


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1 
0.1 0.2 0.3 0.4 0.6 0.8 1 2 3 4 5 6 8 10 20 30 40 50 60 80100 

Friction Loss - Lbs. per Square-lncli Head per 100 Foot Length 



251 



Appendix A 



UNIFORM PLUMBING CODE 



Ch^rt A-5 (Metric) 



Fairly Smooth 



CHART A-5 (Metric) 



Fairiy Smooth 


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Friction Loss - 32.9 Pa/m 



Friction Loss - 32.9 Pa/m 



252 



RECOMMENDED RULES FOR 
SIZING THE WATER SUPPLY SYSTEM 



Appendix A 



Chart A-6 





■ 










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0.1 0.2 0.3 0.4 0.6 0.8 1 2 3 4 5 6 8 10 20 30 40 50 60 80100 

Friction Loss - Lb. per Square-Inch Head per 100 Foot Length 



253 



Appendix A 



UNIFORM PLUMBING CODE 



Chart A-6 (Metric) 











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in 

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lO 
CD 


CJ) 


in 

CO 


i 


f3 

05 


s 





1- •.-■.- CM CO 



Friction Loss - 32.9 Pa/m 



254 



RECOMMENDED RULES FOR 
SIZING THE WATER SUPPLY SYSTEM 



Appendix A 



Chart A-7 











"-A — 


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V 


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^ 


-r- 




Rough 




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10,000 
8000 

6000 
5000 
4000 

3000 
2000 



1000 
800 

600 
500 
400 

300 
200 



100 
80 

60 
50 
40 
30 

20 



10 



0) 
(0 

c 
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o 



0.1 0.2 0.3 0.4 0.6 0.8 1 2 3 4 5 6 8 10 20 30 40 5060 80100 

Friction Loss - Lbs. per Square-Inch Head per 100 Foot Length 



255 



Appendix A 



UNIFORM PLUMBING CODE 



Chart A-7 (Metric) 




630.0 
504.0 

378.0 
315.0 
252.0 

189.0 
126.0 



63.0 




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31.5 




25.2 






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C 




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u 

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CM 


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00 


1^ 


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oo 


00 


t^ r~- 


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m 


CO 


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O CO c^ 


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s 


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CO 

en 




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oo 

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7- 1- CM CO 



Friction Loss - 32.9 Pa/m 



256 



APPENDIX B 

EXPLANATORY NOTES ON COMBINATION WASTE AND VENT SYSTEMS 

(See Section 910.0 fo the UPC for specific limitations.) 



B 1 Combination waste and vent systems, as 
outlined in Section 910.0 of this code, cover the 
horizontal wet venting of a series of traps by means 
of a common waste and vent pipe. Line sizes at least 
two (2) pipe sizes larger than those required for a 
conventional system are designed to maintain a 
wetted perimeter or flow line low enough in the 
waste pipe to allow adequate air movement in the 
upper portion, thus balancing the system. Sinks, 
lavatories, and other fixtures that rough in above the 
floor, should not be permitted on a combination 
waste and vent system, which at best is merely an 
expedient designed to be used in locations where it 
would be structurally impractical to provide venting 
in the conventional manner. 

Combination waste and vent systems are 
intended primarily for extensive floor or shower 
drain installations where separate venting is not 
practical, for floor sinks in markets, demonstration or 
work tables in school buildings, or for similar 
applications where the fixtures are not adjacent to 
walls or partitions. Due to its oversize characteristics, 
such a waste system is not self-scouring, and 
consequently care should be exercised as to the type 
of fixtures connected thereto and to the location of 
cleanouts. In view of its grease-producing potential, 
restaurant kitchen equipment should not be 
connected to a combination waste and vent system. 

B 2 Caution must be exercised to exclude 
appurtenances delivering large quantities or surges 
of water (such as pumps, sand interceptors, etc.) 
from combination waste and vent systems in order 
that adequate venting will be maintained. Small 
fixtures with a waste-producing potential of less 
than seven and one-half (7-1/2) gallons per minute 
(0.5 L/sec.) may be safely assigned a loading value 
of one (1) unit. Long runs should be laid at the 
minimum permissible slope in order to keep 
tailpieces as short as possible. Tailpieces should not 
exceed two (2) feet (610 mm) in length, which may 
necessitate slopes up to forty-five (45) degrees (0.79 
rad) (see definition of horizontal pipe) on some 
branches. 

B 3 It is essential that the pneumatics of such a 
system be properly engineered, as the air pressure 
within the line must at all times balance that of 
outside atmosphere in order to prevent either trap 
seal loss or air locking between traps. Long mains 
shall be provided with additional relief vents 
located at intervals not exceeding one hundred 
(100) feet (30,480 mm). Each such relief vent should 
equal at least one-half (1/2) of the inside cross- 
sectional area of the drainpipe served. 



B 4 Trap sizes are required to be equivalent to 
the branches they serve (two (2) pipe sizes larger 
than normal), and tailpieces between fixtures or 
floor drains and such traps should be reduced to 
normal size. 

B 5 Duplicate layout drawings of each such 
proposed piping system must be presented to the 
Authority Having Jurisdiction and approval | 
obtained before any installation is made. 
Complicated layouts should be checked by 
qualified personnel. 

B 5.1 Example of Sizing. 

A floor drain normally required two (2) inch (50 
mm) trap and waste. On a combination waste 
and vent system, both trap and waste must be 
increased two (2) pipe sizes (through 2-1/2" and 
3") (65 mm and 80 mm) which would make the 
trap three (3) inch (76 mm). Pipe sizes 
recognized for this purpose are 2", 2-1/2", 3", 3- 
1/2", 4", 4-1/2", 5", 6", etc. (50 mm, 65 mm, 80 
mm, 90 mm, 100 mm, 115 mm, 125 mm, 150 mm, 
etc.). The tailpiece between the floor drain and 
its trap should be two (2) inches (51 mm) (or 
normal size) to ensure that the amount of 
wastewater entering the trap only partially fills 
the waste branch. A three (3) inch (80 mm) floor 
drain would thus require a four (4) inch (100 
mm) trap, a four (4) inch (100 mm) floor drain, 
and five (5) inch (125 mm) trap, etc., for the 
reasons previously stated. 

WHEN IN DOUBT, CHECK WITH YOUR 
LOCAL Authority Having Jurisdiction. | 



257 



UNIFORM PLUMBING CODE 



258 



APPENDIX D 

SIZING STORM WATER DRAINAGE SYSTEMS 



D 1 Roof Drainage. 

The rainfall rates in Table D-1 should be used for 
design unless higher values are established locally. 

D 2 Sizing by Flow Rate. 

Storm drainage systems can be sized by storm water 
flow rates, using the appropriate GPM/ square foot of 
rainfall listed in Table D-1 for the local area. 
Multiplying the listed GPM /square foot by the roof 
area being drained by each irilet (in square feet) 
produces the gallons per minute (GPM) of required 
flow for sizing each drain inlet. The flow rates (GPM) 
can then be added to determine the flows in each 
section of the drainage system. Required pipe sizes 
for various flow rates (GPM) are listed in Table 11-1 
and Table 11-2. 

D 3 Sizing by Roof Area. 

Storm drainage systems can be sized using the roof 
area served by each section of the drainage system. 



Maximum allowable roof areas with various rainfall 
rates are listed in Table 11-1 and Table 11-2, along 
with the required pipe sizes. Using this method, it 
may be necessary to interpolate between two listed 
rainfall rate columns (inches per hour). To determine 
the allowable roof area for a listed pipe size at a 
listed slope, divide the allowable square feet of roof 
for a one (1) inch (25.4 mm/h) rainfall rate by the 
listed rainfall rate for the local area. For example, the 
allowable roof area for a six (6) inch (152 mm) drain 
at one-eighth (1/8) inch (3.2 mm) slope with a 
rainfall rate of 3.2 inches (81 mm/h) is 21,400/3.2 = 
6688 square feet (621.3 m' ). 

D 4 Capacity of Rectangular Scuppers. 

Table D-2 lists the discharge capacity of rectangular 
roof scuppers of various widths with various heads 
of water. The maximum allowable level of water on 
the roof should be obtained from the structural 
engineer, based on the design of the roof. 



TABLE D-1 
Maximum Rates of Rainfall for Various Cities 

The rainfall rates in this table are based on U.S. Weather Bureau 
Technical Paper No. 40, Chart 14: 100-Year 60-Minute Rainfall (inches). 





Storm Drainage 


States and Cities 


60-Minute Duration, 100- Year Return 




Inches/Hour 


GPM/Square Foot 


ALABAMA 






Birmingham 


3.7 


0.038 


Huntsville 


3.3 


0.034 


Mobile 


4.5 


0.047 


Montgomery 


3.8 


0.039 


ALASKA 






Aleutian Islands 


1.0 


0.010 


Anchorage 


0.6 


0.006 


Bethel 


0.8 


0.008 


Fairbanks 


1.0 


0.010 


Juneau 


0.6 


0.006 


ARIZONA 






Flagstaff 


2.3 


0.024 


Phoenix 


2.2 


0.023 


Tucson 


3.0 


0.031 



259 



Appendix D 



UNIFORM PLUMBING CODE 



TABLE D-1 Continued 





Storm Drainage 


States and Cities 


60-Minute Duration, 100- Year Return 




Inches/Hour 


GPM/Square Foot 


ARKANSAS 






Eudora 


3.8 


0.039 


Ft. Smith 


3.9 


0.041 


Jonesboro 


3.5 


0.036 


Little Rock 


3.7 


0.038 


CALIFORNIA 






Eureka 


1.5 


0.016 


Lake Tahoe 


1.3 


0.014 


Los Angeles 


2.0 


0.021 


Lucerne Valley 


2.5 


0.026 


Needles 


1.5 


0.016 


Palmdale 


3.0 


0.031 


Redding 


1.5 


0.016 


San Diego 


1.5 


0.016 


San Francisco 


1.5 


0.016 


San Luis Obispo 


1.5 


0.016 


COLORADO 






Craig 


1.5 


0.016 


Denver 


2.2 


0.023 


Durango 


1.8 


0.019 


Stratton 


3.0 


0.031 


CONNECTICUT 






Hartford 


2.8 


0.029 


New Haven 


3.0 


0.031 


DELAWARE 






Dover 


3.5 


0.036 


Rehobeth Beach 


3.6 


0.037 


DISTRICT OF 






COLUMBIA 






Washington 


4.0 


0.042 


FLORIDA 






Daytona Beach 


4.0 


0.042 


Ft. Myers 


4.0 


0.042 


Jacksonville 


4.3 


0.045 


Melbourne 


4.0 


0.042 


Miami 


4.5 


0.047 


Palm Beach 


5.0 


0.052 


Tampa 


4.2 


0.044 


Tallahassee 


4.1 


0.043 


GEORGIA 






Atlanta 


3.5 


0.036 


Brunswick 


4.0 


0.042 


Macon 


3.7 


0.038 


Savannah 


4.0 


0.042 


Thomasville 


4.0 


0.042 



260 



SIZING STORM WATER DRAINAGE SYSTEMS 



Appendix D 



TABLE D-1 Continued 



States and Cities 



Storm Drainage 
eo-IViinute Duration, 100- Year Return 



Inclies/Hour 



GPiVI/Square Foot 



HAWAII 

Rainfall rates in the Hawaiian Islands vary from 1-1/2 inches /hour to 
inches /hour depending on location and elevation. Consult local data. 



IDAHO 

Boise 

Idaho Falls 
Lewiston 
Twin Falls 

ILLINOIS 

Chicago 
Harrisburg 
Peoria 
Springfield 

INDIANA 

Evansville 
Indianapolis 
Richmond 
South Bend 

IOWA 

Council Bluffs 
Davenport 
Des Moines 
Sioux City 

KANSAS 

Goodland 
Salina 
Topeka 
Wichita 

KENTUCKY 

Bowling Green 
Lexington 
Louisville 
Paducah 

LOUISIANA 

Monroe 
New Orleans 
Shreveport 

MAINE 

Bangor 
Kittery 
Millinocket 



1.0 
1.2 
1.0 
1.1 



2.7 
3.1 
2.9 
3.0 



3.0 
2.8 

2.7 
2.7 



3.7 
3.0 
3.4 
3.6 



3.5 
3.8 
3.8 
3.9 



2.9 
2.9 
2.8 
3.0 



3.8 
4.5 
4.0 



2.2 
2.4 
2.0 



0.010 
0.012 
0.010 
0.011 



0.028 
0.032 
0.030 
0.031 



0.031 
0.029 
0.028 
0.028 



0.038 
0.031 
0.035 
0.037 



0.036 
0.039 
0.039 
0.041 



0.030 
0.030 
0.029 
0.031 



0.039 
0.047 
0.042 



0.023 
0.025 
0.021 



261 



Appendix D 



UNIFORM PLUMBING CODE 



TABLE D-1 Continued 



States and Cities 


Storm Drainage 
60-Minute Duration, 100- Year Return 




Inches/Hour • 


GPM/Square Foot 


IVIARYLAND 






Baltimore 


3.6 


0.037 


Frostburg 
Ocean City 


2.9 

3.7 


0.030 
0.038 


MASSACHUSETTS 






Adams 


2.6 


0.027 


Boston 


2.7 


0.028 


Springfield 


2.7 


0.028 


MICHIGAN 






Detroit 


2.5 


0.026 


Grand Rapids 
Kalamazoo 


2.6 

2.7 


0.027 
0.028 


Sheboygan 
Traverse City 


2.1 

2.2 


0.022 
0.023 


MINNESOTA 






Duluth 


2.6 


0.027 


Grand Forks 


2.5 


0.026 


Minneapolis 
Worthington 


3.0 
3.4 


0.031 
0.035 


MISSISSIPPI 






Biloxi 


4.5 


0.047 


Columbus 


3.5 


0.036 


Jackson 


3.8 


0.039 


MISSOURI 






Independence 
Jefferson City 
St. Louis 


3.7 
3.4 
3.2 


0.038 
0.035 
0.033 


Springfield 


3.7 


0.038 


MONTANA 






Billings 
Glendive 


L8 

2.5 


0.019 
0.026 


Great Falls 


1.8 


0.019 


Missoula 


1.3 


0.014 


NEBRASKA 






Omaha 


3.6 


0.037 


North Platte 


3.5 


0.036 


Scotts Bluff 


2.8 


0.029 


NEVADA 






Las Vegas 
Reno 


1.5 
1.2 


0.016 
0.012 


Winnemucca 


1.0 


0.010 



262 



SIZING STORM WATER DRAINAGE SYSTEMS 



Appendix D 



TABLE D-1 Continued 





Storm Drainage 


States and Cities 


60-Minute Duration, 100-Year Return 




Inches/Hour 


GPM/Square Foot 


NEW HAMPSHIRE 






Berlin 


2.2 


0.023 


Manchester 


2.5 


0.026 


NEW JERSEY 






Atlantic City 


3.4 


0.035 


Paterson 


3.0 


0.031 


Trenton 


3.2 


0.033 


NEW MEXICO 






Albuquerque 


2.0 


0.021 


Carlsbad 


2.6 


0.027 


Gallup 


2.1 


0.022 


NEW YORK 






Binghamton 


2.4 


0.025 


Buffalo 


2.3 


0.024 


New York City 


3.1 


0.032 


Schenectady 


2.5 


0.026 


Syracuse 


2.4 


0.025 


NORTH CAROLINA 






Asheville 


3.2 


0.033 


Charlotte 


3.4 


0.035 


Raleigh 


4.0 


0.042 


Wilmington 


4.4 


0.046 


NORTH DAKOTA 






Bismarck 


2.7 


0.028 


Fargo 


2.9 


0.030 


Minot 


2.6 


0.027 


OHIO 






Cincinnati 


2.8 


0.029 


Cleveland 


2.4 


0.025 


Columbus 


2.7 


0.028 


Toledo 


2.6 


0.027 


Youngstown 


2.4 


0.025 


OKLAHOMA 






Boise City 


3.4 


0.035 


Muskogee 


4.0 


0.042 


Oklahoma City 


4.1 


0.043 


OREGON 






Medford 


1.3 


0.014 


Ontario 


1.0 


0.010 


Portland 


1.3 


0.014 



263 



Appendix D 



UNIFORM PLUMBING CODE 



TABLE D-1 Continued 





Storm Drainage 


States and Cities 


60-l\/linute Duration, 100-Year Return 




Inches/Hour 


GPM/Square Foot 


PENNSYLVANIA 






Erie 


2.4 


0.025 


Harrisburg 


2.9 


0.030 


Philadelphia 


3.2 


0.033 


Pittsburgh 


2.5 


0.026 


Scrantori 


2.8 


0.029 


RHODE ISLAND 






Newport 


3.0 


0.031 


Providence 


2.9 


0.030 


SOUTH CAROLINA 






Charlestori 


4.1 


0.043 


Columbia 


3.5 


0.036 


Greenville 


3.3 


0.034 


SOUTH DAKOTA 






Lemmon 


2.7 


0.028 


Rapid City 


2.7 


0.028 


Sioux Falls 


3.4 


0.035 


TENNESSEE 






Knoxville 


3.1 


0.032 


Memphis 


3.5 


0.036 


Nashville 


3.0 


0.031 


TEXAS 






Corpus Christi 


4.6 


0.048 


Dallas 


4.2 


0.044 


El Paso 


2.0 


0.021 


Houston 


4.6 


0.048 


Lubbock 


3.3 


0.034 


San Antonio 


4.4 


0.046 


UTAH 






Bluff 


2.0 


0.021 


Cedar City 


1.5 


0.016 


Salt Lake City 


1.3 


0.014 


VERMONT 






Bennington 


2.5 


0.026 


Burlington 


2.3 


0.024 


Rutland 


2.4 


0.025 


VIRGINIA 






Charlottesville 


3.4 


0.035 


Norfolk 


4.0 


0.042 


Richmond 


4.0 


0.042 


Roanoke 


33 


0.034 



264 



SIZING STORM WATER DRAINAGE SYSTEMS 



Appendix D 



TABLE D-1 Continued 







Storm Drainage 


States and Cities 


60-Minute Duration, 100- Year Return 




Inches/Hour 


GPM/Square Foot 


WASHINGTON 








Seattle 


1.0 




0.010 


Spokane 


1.0 




0.010 


Walla Walla 


1.0 




0.010 


WEST VIRGINIA 








Charleston 


2.9 




0.030 


Martinsburg 


3.0 




0.031 


Morgantown 


2.7 




0.028 


WISCONSIN 








Green Bay 


2.5 




0.026 


La Cross 


2.9 




0.030 


Milwaukee 


2.7 




0.028 


Wausau 


2.5 




0.026 


WYOMING 








Casper 


1.9 




0.020 


Cheyenne 


2.5 




0.026 


Evaston 


1.3 




0.014 


Rock Springs 


1.4 




0.015 



265 



Appendix D 



UNIFORM PLUMBING CODE 



TABLE D-2 
Discharge from Rectangular Scuppers - Gallons per Minute 



Water Head, Width of Scupper in Inches 

Inches 6 12 18 24 30 



36 



1/2 


6 


13 


19 


25 


32 


38 


1 


17 


35 


53 


71 


89 


107 


1-1/2 


31 


64 


97 


130 


163 


196 


2 




98 


149 


200 


251 


302 


2-1/2 




136 


207 


278 


349 


420 


3 




177 


271 


364 


458 


551 


3-1/2 






339 


457 


575 


693 


4 






412 


556 


700 


844 



TABLE D-2 (Metric) 
Discharge from Rectangular Scuppers - Liters per Second 



Water Head Width of Scupper in Millimeters 
(mm) 152 305 457 610 762 



914 



13 


0.4 


0.8 


1.2 


1.6 


2.0 


2.4 


25 


1.1 


2.2 


3.3 


4.5 


5.6 


6.8 


38 


2.0 


4.0 


6.1 


8.2 


10.3 


12.4 


51 




6.2 


9.4 


12.6 


15.8 


19.1 


64 




8.6 


13.1 


17.5 


22.0 


26.5 


76 




11.2 


17.1 


23.0 


28.9 


34.8 


89 






21.4 


28.8 


36.3 


43.7 


102 






26.0 


35.1 


44.2 


53.3 



Notes: 

1. Table D-2 is based on discharge over a rectangular weir with end contractions. 

2. Head is the depth of water above bottom of the scupper opening. 

3. The height of the scupper opening should be at least two (2) times the design head. 

4. Coordinate the allowable head of water with the structural design of the roof. 



266 



APPENDIX E 

MANUFACTURED/MOBILE HOME PARKS AND 
RECREATIONAL VEHICLE PARKS 



Part A 
Manufactured/Mobile Home (M/H) Park 
Definitions and General Requirements 

E 1 Manufactured/Mobile Home. 

A structure transportable in one (1) or more 
sections, which in the traveUng mode is eight (8) 
body feet (2,438 mm) or more in width and forty 
(40) body feet (12,192 mm) or more in length or, 
when erected on site, is three hundred twenty (320) 
or more square feet (29.7 m^), and which is built on 
a permanent chassis, and designed to be used as a 
dwelling with or without a permanent foundation 
when connected to the required utilities. It 
includes the plumbing, heating, air conditioning, 
and electrical systems contained therein. For 
further clarification of definition, see Federal 
Regulation 24 CFR. 

E 1.1 Manufactured/Mobile Home Accessory 
Building or Structure. A building or structure 
which is an addition to or supplements the 
facilities provided to an M/H. It is not a self- 
contained, separate, habitable building or 
structure. Examples are awnings, cabanas, 
ramadas, storage structures, carports, fences, 
windbreaks, or porches. 

E 2 Manufactured/Mobile Home Lot. A portion of 
an M/H park designed for the accommodation of 
one M/H and its accessory buildings or structures 
for the exclusive use of the occupants. 

E 3 Manufactured/Mobile Home Park. A parcel 
(or contiguous parcels) of land which has been so 
designated and improved that it contains two (2) or 
more M/H lots available to the general public for the 
placement thereon of M/H for occupancy. 

General 

E 4 The M/H park plumbing and drainage systems 
shall be designed and installed in accordance with 
the requirements of this appendix and the 
requirements of this code. 

E 5 Before any plumbing or sewage disposal facilities 
are installed or altered in any M/H park, duplicate 
plans and specifications shall be filed and proper 
permits obtained from the department or departments 
having jurisdiction. Plans shall show in detail: 

(A) Plot plan of the park drawn to scale, 
indicating elevations, property lines. 



driveways, existing or proposed buildings 
and the sizes of M/H lots. 

(B) Complete specification and piping layout of 
proposed plumbing systems or alteration. 

(C) Complete specification and layout of 
proposed sewage disposal system or alteration. 

(D) The nature and extent of the work proposed, 
showing clearly that such work will 
conform to the provisions of this code. 

PartB 

Manufactured/Mobile Home Park Drainage 
System Construction 

E 6 Drainage Systems. 

A drainage system shall be provided in all M/H 
parks for conveying and disposing of all sewage. 
Wherever feasible, connection shall be made to a 
public system. All new improvements shall be 
designed, constructed, and maintained in accordance 
with applicable laws and regulations. Where the 
drainage lines of the M/H park are not connected to 
a public sewer, all proposed sewage disposal facilities 
shall be approved by the Authority Having I 
Jurisdiction prior to construction. I 

E7 Material. 

Pipe and fittings installed underground in M/H park 
drainage systems shall be of material approved for the 
purpose. M/H lot drainage inlets and extensions to 
grade shall be of material approved for underground 
use within a building. 

E 8 Drainage (Sewage) Lines. 

All drainage (sewage) collection lines shall be located 
in trenches of sufficient depth to be free of breakage 
from traffic or other movements and shall be 
separated from the park water supply system as 
specified in this code. Drainage (sewage) lines shall 
have a minimum size and slope as specified in 
Tables E-1 and E-2. 

E 9 M/H Lot Drainage Inlet and Lateral. 

(A) Size. Each lot shall be provided with a 
drainage inlet not less than three (3) inches 
(76 mm) in diameter. 

(B) The lateral line from the inlet to the sewage 
drain line shall slope at least one-fourth 
(1/4) inch per foot (20.9 mm/m). All joints 
shall be watertight. 

267 



Appendix E 



UNIFORM PLUMBING CODE 



(C) All materials used for drainage connections 
between an M/H and the lot drainage inlet 
shall be semi-rigid, corrosion-resistant, non- 
absorbent, and durable. The inner surface 
shall be smooth. 

(D) Provision shall be made for plugging or 
capping the sewage drain inlet when an 
M/H does not occupy the lot. Surface 
drainage shall be diverted away from the 
inlet. The rim of the inlet shall extend not 
more than four (4) inches (102 mm) above 
ground elevation. 

E 10 Location of Lot Drain Inlet. 

Each lot drainage inlet shall be located in the rear 
third section and within four (4) feet (1219 mm) of 
the proposed location of the M/H. 

E 11 Pipe Size. 

(A) Each M/H lot drainage inlet shall be 
assigned a waste loading value of twelve 
(12) fixture units, and each park drainage 



system shall be sized according to Table E-1 
or as provided herein. Drainage laterals 
shall be not less than three (3) inches (76 
mm) in diameter. 

(B) A park drainage system which exceeds the 
fixture unit loading of Table E-1 or in which 
the grade and slope of drainage pipe does 
not meet the minimun\ specified in Table 
E-2 shall be designed by a registered 
professional engineer. 

E12 M/H Drain Connector. 

(A) An M/H shall be connected to the lot 
drainage inlet by means of a drain connector 
consisting of approved pipe not less than 
Schedule 40, appropriate fittings and 
connectors, and not less in size than the 
M/H drainage outlet. An approved 
cleanout shall be provided between the 
M/H and the lot drainage inlet. The fitting 
connected to the lot drainage inlet shall be a 



TABLE E-1 
Drainage Pipe Diameter and Number of Fixture Units on Drainage System 



Size of Drainage Pipe Maximum Number 
Inches mm of Fixture Units 



T 


51 


8 


3 


76 


35 


4 


102 


256 


5 


127 


428 


6 


152 


720 


8 


203 


2640 


10 


254 


4680 


12 


305 


8200 



"Except six unit fixtures 



TABLE E-2 
Minimum Grade and Slope of Drainage Pipe 







Slope per 






Slope per 


Pipe Size 


100 ft. 


(30.5 m) 


Pipe Size 


100 ft. (30.5 m) 


Inches 


mm 


Inches 


mm 


Inches 


mm 


Inches mm 


2 


51 


25 


635 


6 


152 


8 203 


3 


76 


25 


635 


8 


203 


4 102 


4 


102 


15 


381 


10 


254 


3-1/2 89 


5 


127 


11 


279 


12 


305 


3 76 



268 



MANUFACTURED/MH PARKS AND RV PARKS 



Appendix E 



directional fitting to discharge the flow into 
the drainage inlet. 

(B) A drain connector shall be installed or 
maintained with a grade not less than one- 
fourth (1/4) inch per foot (20.9 mm/m). A 
drain connector shall be gastight and no 
longer than necessary to make the 
connection between the M/H outlet and the 
drain inlet on the lot. A flexible connector 
may be used at the lot drainage inlet area 
only. Each lot drainage inlet shall be capped 
gastight when not in use. 

Parte 

M/H Park Water Supply 

E 13 General Requirements. 

An accessible and adequate supply of potable water 
shall be provided in each M/H park. Where a public 
supply of water of satisfactory quantity, quality, and 
pressure is available at or within the boundary of the 
park site, connection shall be made thereto and its 
supply used exclusively. When a satisfactory public 
water supply is not available, a private water supply 
system shall be developed and used as approved by 
I the Authority Having Jurisdiction. 

E 14 Lot Service Outlet Size. 

Each M/H lot shall be provided with a water service 
outlet delivering potable water. The water service 
outlet riser shall be not less than three-fourths (3/4) 
inch (19.1 mm) nominal pipe size and capable of 
delivering twelve (12) fixture units. 

E 15 Location of Water Service. 

Each lot water service outlet shall be located in the 
rear third section and within four (4) feet (1219 mm) 
of the proposed location of the M/H. 

E 16 Pressure. 

Each M/H park water distribution system shall be so 
designed and maintained as to provide a pressure of 
not less than twenty (20) pounds per square inch 
(138 kPa) at each M/H lot at maximum operating 
conditions. 

E 17 Water Distribution Piping. 

Park water distribution systems shall be designed to 
deliver a minimum of twelve (12) fixture units of 
water to each lot and installed with materials as set 
forth in Chapter 6 and /or Appendix A of this code. 

E18 Shutoff Valve. 

A separate water shutoff valve shall be installed in 
each water service outlet at each M/H lot. Where a 
listed backflow protective device is installed, the 
service shutoff shall be located on the supply side of 
such device. 



E19 Backflow Preventer. 

Whenever a condition exists in the plumbing of a 
M/H that may create a cross connection, a listed 
backflow preventer shall be installed in the water 
service line to the M/H at or near the water service 
outlet. When a hose bibb or outlet is installed on the 
supply outlet riser in addition to the service 
connector, a listed backflow preventer shall be 
installed on each additional outlet. 

E 20 Pressure Relief Valve. 

Whenever it is required to install a backflow 
preventer at the M/H lot service outlet, a listed 
pressure relief valve shall be installed in the water 
service line on the discharge side of the backflow 
preventer. Pressure relief valves shall be set to 
release at a pressure not to exceed one hundred fifty 
(150) pounds per square inch (1034 kPa). Pressure 
relief valves shall discharge toward the ground. 
Backflow preventers and pressure relief valves shall 
be at least twelve (12) inches (305 mm) above the 
ground. 

E 21 Mechanical Protection. 

All park water service outlets, backflow preventers, 
and pressure relief valves shall be protected from 
damage by vehicles or other causes. Such protection 
may consist of posts, fencing, or other permanent 
barriers. 

E22 M/H Water Connector. 

An M/H shall be cormected to the park water service 
outlet by a flexible connector, such as copper tubing 
or other approved material not less than three 
quarter (3/4) inch nominal (19.1 mm) interior 
diameter. 

E 23 Water Conditioning Equipment. 

(A) Permit Required. A permit shall be 
obtained from the Authority Having i 
Jurisdiction prior to installing any water | 
conditioning equipment on an M/H lot. 
Approval of the park operator is required on 
all applications for a permit to install such 
equipment. If the water conditioning 
equipment is of the regenerating type, and 
the park drainage system discharges into a 
public sewer, approval of the sanitary 
district or agency having jurisdiction over 
the public sewer is required. 

(B) Approval. Regenerating water-conditioning 
equipment shall be listed and labeled by an 
approved listing agency. 

(C) Installation. Regenerating units shall 
discharge the effluent of regeneration into a 
trap not less than one and one-half (1-1/2) 
inches (38 mm) in diameter connected to the 



269 



Appendix E 



UNIFORM PLUMBING CODE 



M/H park drainage system. An approved 
air gap shall be installed on the discharge 
line a mininiuin of twelve (12) inches (305 
mm) above the ground. 

E 24 Testing. 

Installations shall be tested and inspected as 
required by Chapter 3 of this code. 



PartD 

Fuel Supply 

E 25 General. 

All fuel gas piping systems serving manufactured 
homes, accessory buildings, or structures and 
communities shall be designed and constructed in 
accordance with any applicable provisions of NFPA 
54, National Fuel Gas Code, and NFPA 58, Liquefied 
Petroleum Gas Code. NFPA 31, Standard for the 
Installation of Oil-Burning Equipment, shall apply to 
oil fuel-burning systems and shall conform to the 
criteria of the Authority Having Jurisdiction. 

E 25.1 Gas Supply Connections. 

Gas supply connections at sites, where provided 
from an underground gas supply piping system, 
shall be located and arranged to permit 
attachment to an M/H occupying the site in a 
work-like manner. For the installation of 
liquefied petroleum gas (LPG) storage systems, 
the applicable provisions of NFPA 58, Liquefied 
Petroleum Gas Code, shall be followed. 

E 25.2 Location of Gas Supply Connection. 

The gas supply to the M/H shall be located 
within 4 feet (1.22 m) of the M/H stand. [NFPA 
501A: Sections 23, 2.3.8, 2.4, and 2.4.5.] 

Exception: The above requirements shall not 
apply to gas supply connections for 
manufactured homes located on all-weather 
wood, concrete, or concrete block 
foundation systems or on foundations 
constructed in accordance with the local 
building code or, in the absence of a local 
code, with a recognized model building 
code. [NFPA 501A Section 2.1.3] 

E 26 Single and Multiple Manufactured Homei Site 
Fuel Supply Systems. 

E 26.1 Gas Piping Installations. 

E 26.1.1 Gas Supply Connections - 
Underground Gas Piping. 

Gas supply connections at sites, where 
provided from an underground gas supply 

270 



piping system, shall be located and arranged 
to permit attachnient in a work-like manner 
to a manufactured home occupying the site. 
For the installation of LPG storage systems, 
the provisions of NFPA 58, Liquefied 
Petroleum Gas Code, shall be followed. 

E 26.1.2 Underground gas piping system 
installations shall comply with any 
applicable building code and Sections E 
26.1.2.1 and E 26.1.2.2. 

E 26.1.2.1 Underground gas piping shall 
not be installed beneath that portion of an 
M/H site reserved for the location of a 
manufactured home or M/H accessory 
building or structure unless installed in the 
open-ended gastight conduit of Section E 
26.1.2.2. 

E 26.1.2.2 The open-ended gastight conduit 
shall conform to the following: 

(1) The conduit shall be not less than 
Schedule 40 pipe that is approved for 
underground installation beneath 
btiildings. 

(2) The interior diameter of the condtiit 
shall be not less than 0.5 inches (12.7 
mm) larger than the outside diameter of 
the gas piping. 

(3) The conduit shall extend to a point not 
less than 4 inches (102 mm) beyond the 
outside wall of the M/H, accessory 
building or structure, and the outer 
ends shall not be sealed. 

(4) Where the conduit terminates within an 
M/H, accessory building or structure, it 
shall be readily accessible, and the space 
between the conduit and the gas-piping 
shall be sealed to prevent leakage of gas 
into the building. 

E 27 Manufactured Home Site Gas Shutoff Valve. 

Each M/H site shall have a listed gas shutoff valve 
installed upstream of the M/H site gas outlet. The 
gas shutoff valve shall be located on the outlet riser 
at a height of not less than 6 inches (152 mm) above 
grade. A gas shutoff valve shall not be located under 
any M/H. The outlet shall be equipped with a cap or 
plug to prevent discharge of gas whenever the M/H 
site outlet is not connected to an M/H. 

Exception: All gas shutoff valves for 
manufactured homes located on foundations 
constructed in accordance with the local building 
code or, in the absence of a local code, with a 
recognized model building code. 

E 28 Gas Meters. 



MANUFACTURED/MH PARKS AND RV PARKS 



Appendix E 



E 28.1 Support of Meters. Where installed, gas 
meters shall be adequately supported by a post 
or bracket placed on a firm footing or other 
means providing equivalent support and shall 
not depend on the gas outlet riser for support. 

E 28.2 Location of Meters. Each gas meter 
shall be installed in an accessible location and 
shall be provided with unions or other fittings so 
that the motor is removed easily and replaced in 
an upright position. Meters shall not be installed 
in unventilated or inaccessible locations or closer 
than 3 ft (0.91 m) to sources of ignition. 

E 28.3 Meter Shutoff Valve or Cock. Ail gas 

meter installations shall be provided with 
shutoff valves or cocks located adjacent to and 
on the inlet side of the meters. In the case of a 
single meter installation utilizing an LP-Gas 
container, the container service valve shall be 
permitted to be used in lieu of the shutoff valve 
or cock. All gas meter installations shall be 
provided with test tees located adjacent to and 
on the outlet side of the rneters. 

E 29 Multiple Manufactured Home Site Fuel 
Distribution and Supply Systems. [NFPA 501A: 
Section 2.1, 2.3.11, 2.4, and 2.4.5.] 

E 30 Manufactured Home Community Natural Gas 
Distribution Systems. 

All underground metallic fuel piping systems shall 
comply with the cathodic protection requirements of 
49 CFR 191 and 192. [NFPA 501A: Section 2.3.1] 

E 31 Manufactured Home Community LPG 
Supply Systems. 

Where ten or more customers are served by one LPG 
supply system, the installation of the gas supply system 
shall be in accordance with 49 CFR 192, Transportation 
of Natural and Other Gas by Pipeline: Minimum Federal 
Safety Standards. Other liquefied petroleum gas supply 
systems and the storage and handling of LPG shall be 
in accordance with NFPA 58, Liquefied Petroleum Gas 
Code. [NFPA 501A: Section 2.3.8.] 

E 32 Installation of Cathodic Protection Systems. 

Where required by the federal standard cited in 
NFPA 501A Section 2.3.1, cathodic protection shall 
be installed for corrosion control of buried or 
submerged metallic gas piping. [NFPA 501A: Section 
2.3.6.1 and 2.3.6.2.] 

E 33 Required Gas Supply. 

The minimum hourly volume of gas required at each 
M/H site outlet or any section of the M/H 
community gas piping system shall be calculated as 
shown in Table E 33.1. 

E 34 Gas Pipe Sizing and Pressure. 

E 34.1 The size of each section of a gas piping 
system shall be determined in accordance with 



NFPA 54, National Fuel Gas Code, or by other 
standard engineering methods acceptable to the 
Authority Having Jurisdiction. 

E 34.2 Where all connected appliances are 
operated at their rated capacity, the supply 
pressure shall be not less than 4 ounces per square 
inch [7 in. water column (1743 Pa)]. The gas 
supply pressure shall not exceed 8 ouces per 
square inch [14 in. water column (3486 Pa)]. 

E 35 Gas Piping Materials. 

E 35.1 Metal. Metal gas pipe shall be standard- 
weight wrought iron or steel (galvanized or 
black), yellow brass containing not more than 75 
percent copper, or internally tinned or treated 
copper of iron pipe size. Galvanizing shall not be 
considered protection against corrosion. 

Seamless copper or steel tubing shall be 
permitted to be used with gases not corrosive to 
such material. Steel tubing shall comply with 
ASTM A 539, Standard Specification for Electric- 
Resistance-Welded Coiled Steel Tubing for Gas and 
Fuel Oil Lines, or ASTM A 254, Standard 
Specification for Copper-Brazed Steel Tubing. 
Copper tubing shall comply with ASTM B 88, 
Specification for Seamless Copper Water Tubing 
(Type K or Type L), or ASTM B 280, Specification 
for Seamless Copper Tubing for Air Conditioning 



TABLE E-3 

Demand Factors for Use in Calculating Gas 

Piping Systems in M/H Communities 



No. of 


Btu/h per 


Manufactured 


Manufactured 


Home 


Home Site 


Sites 




1 


125,000 


2 


117,000 


3 


104,000 


4 


96,000 


5 


92,000 


6 


87,000 


7 


83,000 


8 


81,000 


9 


79,000 


10 


77,000 


11-20 


66,000 


21-30 


62,000 


31^0 


58,000 


41-60 


55,000 


Over 60 


50,000 



Note: 

In extreme climate areas, additional capacities shall be 
considered. 



271 



Appendix E 



UNIFORM PLUMBING CODE 



and Refrigeration Field Service. Copper tubing 
(unless tin-lined) shall not be used if the gas 
contains nnore than an average of 0.3 grains of 
hydrogen sulfide per 100 standard feet^ of gas. 

E 35.2 Protection Coatings for Metal Gas 
Piping. All buried or submerged metallic gas 
piping shall be protected from corrosion by 
approved coatings or wrapping materials. All gas 
pipe protective coatings shall be approved types, 
shall be machine applied, and shall conform to 
recognized standards. Field wrapping shall 
provide equivalent protection and is restricted to 
those short sections and fittings that are 
necessarily stripped for threading or welding. 
Risers shall be coated or wrapped to a point at 
least 6 inches (152 mm) above ground. 

E 35.3 Plastic. Plastic piping shall be used 
underground only and shall meet the 
requirements of ASTM D 2513, Thermoplastic 
Gas Pressure Pipe, Tubing, and Fittings, or 
ASTM D 2517, Reinforced Epoxy Resin Gas 
Pressure Pipe and Fittings, as well as the design 
pressure and design limitations of 49 CFR 
192.123, and shall otherwise conform to the 
installation requirements thereof. 

E 36 Gas Piping Installations. 

E 36.1 Minimum Burial Below Ground Level 
and Clearances. 

All gas piping installed below ground level shall 
have a minimum earth cover of 18 inches (451 
mm) and shall be installed with at least 12 inches 
(305 mm) of clearance in any direction from any 
other underground utility system. 

E 36.2 Metallic Gas Piping. 

E 36.2.1 All metallic gas piping systems 
shall be installed in accordance with 
approved plans and specifications, 
including provisions for cathodic protection. 
Each cathodic protection system shall be 
designed and installed to conform to the 
provisions of 49 CFR 192. 

E 36.2.2 Where the cathodic protection 
system is designed to protect only the gas 
piping system, the gas piping system shall 
be electrically isolated from all other 
underground metallic systems or 
installations. Where only the gas piping 
system is cathodically protected against 
corrosion, a dielectric fitting shall be used in 
the M/H gas connection to insulate the 
M/H from the underground gas piping 
system. 

E 36.2.3 Where a cathodic protection system 
is designed to provide all underground 
272 



metallic systems and installations with 
protection against corrosion, all such systems 
and installations shall be electrically bonded 
together and protected as a whole. 

E 36.3 Plastic Gas Piping. Plastic gas piping 
shall only be used underground and shall be 
installed with an electrically conductive wire for 
locating the pipe. The wire used to locate the 
plastic pipe shall be copper, not smaller in size 
than No. 18 AWG, with insulation approved for 
direct burial. Every portion of a plastic gas 
piping system consisting of metallic pipe shall 
be cathodically protected against corrosion. 

E 36.4 Gas Piping System Shutoff Valve. A 

readily accessible and identifiable shutoff valve 
controlling the flow of gas to the entire M/H 
community gas piping system shall be installed 
near the point of connection to the service piping 
or to the supply connection of an LPG container. 

E 37 Liquefied Petroleum Gas Equipment. 

LPG equipment shall be installed in accordance 
with the applicable provisions of NFPA 58, 

Liquefied Petroleum Gas Code. 

E 38 Oil Supply. 

The following three methods of supplying oil to an 
individual M/H site shall be permitted: 

(1) Supply from an outside imderground tank (see 
Section 2.4.6) 

(2) Supply from a centralized oil distribution 
system designed and installed in accordance 
with accepted engineering practices and in 
compliance with NFPA 31,Standard for the 
Installation of Oil-Burning Equipment 

(3) Supply from an outside aboveground tank (see 
Section 2.4.6) 

E 38.1 Minimum Oil Supply Tank Size. Oil 

supply tanks shall have a minimum capacity 
equal to 20 percent of the average annual oil 
consumption. 

E 38.2 Oil Supply Connections - General. Oil 

supply connections at M/H stands, where 
provided from a centralized oil distribution 
system, shall be located and arranged to permit 
attachment in a work-like manner to a 
manufactured home utilizing the stand. The 
installation of such facilities shall meet the 
provisions of NFPA 31, Standard for the 
Installation of Oil-Burning Equipment, and 
particularly Section 3.8 thereof. 

E 39 Fuel Supply Systems Installation. 

E 39.1 Flexible Gas Connector. Each gas 
supply connector shall be listed for outside M/H 
use, shall be not more than 6 ft (1.83 m)